<PAGE>

                          FOURTH SUPPLEMENTAL INDENTURE


                  The undersigned are executing and delivering this Fourth
Supplemental Indenture pursuant to Section 4.13 of the Indenture, dated as of
August 24, 1998, as supplemented (the "Indenture"), among Berry Plastics
Corporation (the "Company"), BPC Holding Corporation ("Holding"), Berry Iowa
Corporation ("Berry Iowa"), Berry Tri-Plas Corporation ("Berry Tri-Plas"), Berry
Sterling Corporation ("Berry Sterling"), AeroCon, Inc. ("AeroCon"), PackerWare
Corporation ("PackerWare"), Berry Plastics Design Corporation ("Berry Design"),
Venture Packaging, Inc. ("Venture"), Berry Plastics Technical Services, Inc.
(f/k/a Venture Packaging Southeast, Inc.)("Berry Technical"), Venture Packaging
Midwest, Inc. ("Midwest"), NIM Holdings Limited ("NIM"), Berry Plastics U.K.
Limited (f/k/a Norwich Injection Moulders Limited)("Berry UK"), Norwich
Acquisition Limited ("Norwich"), Knight Plastics, Inc. ("Knight"), CPI Holding
Corporation ("CPI"), Cardinal Packaging, Inc. ("Cardinal"), Poly-Seal
Corporation ("Poly-Seal"), Berry Plastics Acquisition Corporation II (f/k/a
Berry Plastics Acquisition Corporation)("BPAC II"), Berry Plastics Acquisition
Corporation III ("BPAC III") and United States Trust Company of New York, as
trustee (the "Trustee"). Capitalized terms used herein have the same meanings
given in the Indenture unless otherwise indicated.

                  By executing and delivering to the Trustee this Fourth
Supplemental Indenture, each of CBP Holdings S.r.l., an Italian S.r.l. (f/k/a
Capsol-Berry Plastics S.r.l.), Capsol S.p.A., an Italian S.p.A. and Ociesse
S.r.l., an Italian S.r.l. (each, a "New Guarantor" and collectively, the "New
Guarantors"), hereby becomes a "Guarantor" under the Indenture and hereby agrees
to become a party to, to be bound by, and to comply with the provisions of the
Indenture in the same manner as if it were an original signatory to such
agreement.

                  Each of the New Guarantors hereby unconditionally guarantees
that (i) the principal of and interest on the Notes will be paid in full when
due, whether at the maturity or interest payment or mandatory redemption date,
by acceleration, call for redemption or otherwise, and interest on the overdue
principal of and interest, if any, on the Notes and all other obligations of the
Company to the Holders or the Trustee under the Indenture or the Notes will be
promptly paid in full or performed, all in accordance with the terms of the
Indenture and the Notes and (ii) in case of any extension of time of payment or
renewal of any Notes or any of such other obligations, that the same will be
promptly paid in full when due or performed in accordance with the terms of the
extension or renewal, whether at maturity, by acceleration or otherwise.

                  By executing and delivering to the Trustee this Fourth
Supplemental Indenture, each of Holding, Berry Iowa, Berry Tri-Plas, Berry
Sterling, AeroCon, PackerWare, Berry Design, Venture, Berry Technical, Midwest,
NIM, Berry UK, Norwich, Knight, CPI, Cardinal, Poly-Seal, BPAC II, and BPAC III
(each an "Old Guarantor") hereby reaffirms its obligations under the Indenture
as previously supplemented and as further supplemented hereby.

                  The obligations of each of the undersigned to each Holder and
to the Trustee pursuant hereto are as expressly set forth in Article 10 of the
Indenture which terms are incorporated herein by reference.

<PAGE>

                  This is a continuing guarantee and shall remain in full force
and effect and shall be binding upon each of the undersigned and its successors
and assigns until full and final payment of all of the Company's obligations
under the Notes and the Indenture and shall inure to the benefit of the
successors and assigns of the Trustee and the Holders and, in the event of any
transfer or assignment of rights by any Holder or the Trustee, the rights and
privileges herein conferred upon that party shall automatically extend to and be
vested in such transferee or assignee, all subject to the terms and conditions
hereof. This is a guarantee of payment and not a guarantee of collection.

                  Each of the Company and the Guarantors (hereinafter,
collectively, the "Obligors") hereby agrees that all judicial proceedings
brought against it arising out of or relating to the Indenture, or any
obligations hereunder, may be brought in any State or Federal Court of competent
jurisdiction in the State, County and City of New York in the United States of
America. By executing and delivering this Fourth Supplemental Indenture, each of
the Obligors hereby irrevocably: (i) accepts generally and unconditionally the
nonexclusive jurisdiction and venue of such courts, (ii) waives any defense of
FORUM NON CONVENIENS; (iii) designates and appoints Joseph S. Levy, or such
other persons located in New York State selected by the Obligors from time to
time, and agreeing in writing to so serve, as its agent to receive on its behalf
service of all process in any such proceedings in any such court, such service
being hereby acknowledged by each of the Obligors to be effective and binding
service in every respect (with a copy of any such process so served to be mailed
by registered mail to each of the Obligors at its address provided that, unless
otherwise provided by applicable law, any failure to mail such copy shall not
affect the validity of service of such process) and each of the Obligors hereby
agrees that service of process sufficient for personal jurisdiction in any
action in the State of New York may be made by registered or certified mail,
return receipt requested, to it at its address and hereby acknowledges that such
service shall be effective and binding in every respect; and nothing herein
shall affect the right to serve process in any other manner permitted by law or
shall limit the right to bring proceedings against any of the Obligors in the
courts of any other jurisdiction; and (iv) agrees that the provisions of this
Fourth Supplemental Indenture relating to jurisdiction and venue shall be
binding and enforceable to the fullest extent permissible under New York General
Obligations Law, Section 5-1402 or otherwise.

                  Any and all payments to be made by any of the undersigned to
the Trustee shall be made in U.S. Dollars. If, for the purpose of calculating
the amount of any judgment in any court, it is necessary to convert into any
other currency (the "Judgment Currency") an amount due in U.S. Dollars under the
Indenture, then the conversion shall be made at the discretion of the Trustee,
at the rate of exchange prevailing either on the date of default or on the day
before the day on which the award or judgment is given (the "Conversion Date").
If there is a change in the rate of exchange prevailing between the Conversion
Date and the date of actual payment of the amount due, the undersigned will pay
such additional amounts (if any, but in any event, not a lesser amount) as may
be necessary to ensure that the amount paid in the Judgment Currency when
converted at the rate of exchange prevailing on the date of payment will produce
the amount then due in U.S. Dollars.

                  This Fourth Supplemental Indenture may be executed in
counterparts. Each signed copy shall be an original, but all of them together
represent the same agreement.

                                     -2-

<PAGE>

                  IN WITNESS WHEREOF, the undersigned have duly executed and
delivered this Fourth Supplemental Indenture as of the ____ day of _________,
2000.


ATTEST:                                     BERRY PLASTICS CORPORATION

                                            By:
                                               ---------------------------------
                                               James M. Kratochvil
By:                                            Executive Vice President, Chief
     --------------------------------          Financial Officer, Treasurer and
       Martin R. Imbler                        Secretary
       President and Chief Executive
       Officer


                                            BPC HOLDING CORPORATION



                                            By:
                                               ---------------------------------
                                               James M. Kratochvil
                                               Executive Vice President, Chief
                                               Financial Officer, Treasurer and
                                               Secretary



                                            BERRY IOWA CORPORATION



                                            By:
                                               ---------------------------------
                                               James M. Kratochvil
                                               Executive Vice President, Chief
                                               Financial Officer, Treasurer and
                                               Secretary



                                            BERRY TRI-PLAS CORPORATION



                                            By:
                                               ---------------------------------
                                               James M. Kratochvil
                                               Executive Vice President, Chief
                                               Financial Officer, Treasurer and
                                               Secretary



                                            BERRY STERLING CORPORATION



                                            By:
                                               ---------------------------------
                                               James M. Kratochvil
                                               Executive Vice President, Chief
                                               Financial Officer, Treasurer and
                                               Secretary

<PAGE>

                                            AEROCON, INC.



                                            By:
                                               ---------------------------------
                                               James M. Kratochvil
                                               Executive Vice President, Chief
                                               Financial Officer, Treasurer and
                                               Secretary



                                            PACKERWARE CORPORATION



                                            By:
                                               ---------------------------------
                                               James M. Kratochvil
                                               Executive Vice President, Chief
                                               Financial Officer, Treasurer and
                                               Secretary



                                            BERRY PLASTICS DESIGN CORPORATION



                                            By:
                                               ---------------------------------
                                               James M. Kratochvil
                                               Executive Vice President, Chief
                                               Financial Officer, Treasurer and
                                               Secretary



                                            VENTURE PACKAGING, INC.



                                            By:
                                               ---------------------------------
                                               James M. Kratochvil
                                               Executive Vice President, Chief
                                               Financial Officer, Treasurer and
                                               Secretary



                                            BERRY PLASTICS TECHNICAL SERVICES,
                                            INC.



                                            By:
                                               ---------------------------------
                                               James M. Kratochvil
                                               Executive Vice President, Chief
                                               Financial Officer, Treasurer and
                                               Secretary

<PAGE>

                                            VENTURE PACKAGING MIDWEST, INC.



                                            By:
                                               ---------------------------------
                                               James M. Kratochvil
                                               Executive Vice President, Chief
                                               Financial Officer, Treasurer and
                                               Secretary



                                            NIM HOLDINGS LIMITED



                                            By:
                                                 James M. Kratochvil
                                                 Director



                                            BERRY PLASTICS U.K. LIMITED



                                            By:
                                               ---------------------------------
                                               James M. Kratochvil
                                               Director



                                            NORWICH ACQUISITION LIMITED



                                            By:
                                               ---------------------------------
                                               James M. Kratochvil
                                               Director



                                            KNIGHT PLASTICS, INC.



                                            By:
                                               ---------------------------------
                                               James M. Kratochvil
                                               Executive Vice President, Chief
                                               Financial Officer, Treasurer and
                                               Secretary



                                            CPI HOLDING CORPORATION



                                            By:
                                               ---------------------------------
                                               James M. Kratochvil
                                               Executive Vice President, Chief
                                               Financial Officer, Treasurer and
                                               Secretary

<PAGE>

                                            CARDINAL PACKAGING, INC.



                                            By:
                                               ---------------------------------
                                               James M. Kratochvil
                                               Executive Vice President, Chief
                                               Financial Officer, Treasurer and
                                               Secretary



                                            BERRY PLASTICS ACQUISITION
                                            CORPORATION II



                                            By:
                                               ---------------------------------
                                               James M. Kratochvil
                                               Executive Vice President, Chief
                                               Financial Officer, Treasurer and
                                               Secretary



                                            BERRY PLASTICS ACQUISITION
                                            CORPORATION III



                                            By:
                                               ---------------------------------
                                               James M. Kratochvil
                                               Executive Vice President, Chief
                                               Financial Officer, Treasurer and
                                               Secretary



                                            POLY-SEAL CORPORATION



                                            By:
                                               ---------------------------------
                                               James M. Kratochvil
                                               Executive Vice President, Chief
                                               Financial Officer, Treasurer and
                                               Secretary



                                            CAPSOL-BERRY PLASTICS S.R.L.



                                            By:
                                               ---------------------------------
                                               James M. Kratochvil
                                               Director



                                            CAPSOL S.P.A.



                                            By:
                                               ---------------------------------
                                               James M. Kratochvil
                                               Director

<PAGE>

                                            OCIESSE S.R.L.


                                            By:
                                               ---------------------------------
                                               James M. Kratochvil
                                               Director

<PAGE>

                                            UNITED STATES TRUST COMPANY OF
                                            NEW YORK, AS TRUSTEE



                                            By:
                                               ---------------------------------
                                               Name:
                                               Title:

<PAGE>

                       Schedule of Supplemental Indentures

<TABLE>
<CAPTION>
Document                             Date                  Parties                              Reason for Supplement
===================================================================================================================================
<S>                                  <C>                   <C>                                  <C>
First Supplemental Indenture to the  October 16, 1998      Knight Plastics, Inc. ("Knight"),    Added Knight as a guarantor
Indenture dated as of August 24,                           Berry, BPC, Iowa, Tri-Plas,
1998 (the "Indenture") among Berry                         Sterling, AeroCon, PackerWare,
Plastics Corporation ("Berry"), BPC                        Plastics, VPI, Southeast, Midwest,
Holding Corporation ("BPC"), Berry                         NIM, Norwich and Trustee
Iowa Corporation ("Iowa"), Berry
Tri-Plas Corporation ("Tri-Plas"),
Berry Sterling Corporation
("Sterling"), AeroCon, Inc.
("AeroCon"), PackerWare Corporation
("PackerWare"), Berry Plastics
Design Corporation ("Plastics"),
Venture Packaging, Inc. ("VPI"),
Venture Packaging Southeast, Inc.
("Southeast"), Venture Packaging
Midwest, Inc. ("Midwest"), NIM
Holdings Limited ("NIM"), Norwich
Injection Moulders Limited
("Norwich") and United States Trust
Company of New York, as trustee
(the "Trustee")
-----------------------------------------------------------------------------------------------------------------------------------
Second Supplemental Indenture to     July 9, 1999          Norwich Acquisition Limited          Added Norwich Acquisition, CPI
the Indenture among Berry, BPC,                            ("Norwich Acquisition"), CPI         Holding,
Iowa, Tri-Plas, Sterling, AeroCon,                         Holding Corporation ("CPI Cardinal
PackerWare, Plastics, VPI,                                 and BPAC II as guarantors
Southeast, Midwest, NIM, Berry                             Holding"), Cardinal Packaging, Inc.
Plastics U.K. Limited (f/k/a                               ("Cardinal"), Berry Plastics
Norwich Injection Moulders Limited)                        Acquisition Corporation II ("BPAC
("Plastics U.K."), Knight and                              II"), Berry, BPC, Iowa, Tri-Plas,
Trustee                                                    Sterling, AeroCon, PackerWare,
                                                           Plastics, VPI, Southeast, Midwest,
                                                           NIM, Plastics U.K., Knight and
                                                           Trustee
-----------------------------------------------------------------------------------------------------------------------------------
Third Supplemental Indenture to the  May 9, 2000           Berry Plastics Acquisition           Added BPAC III and Poly-Seal as
Indenture among Berry, BPC, Iowa,                          Corporation III ("BPAC III"),        guarantors
Tri-Plas, Sterling, AeroCon,                               Poly-Seal Corporation
PackerWare, Plastics, VPI,                                 ("Poly-Seal"), Berry, BPC, Iowa,
Southeast, Midwest, NIM, Plastics                          Tri-Plas, Sterling, AeroCon,
U.K., Norwich Acquisition, Knight,                         PackerWare, Plastics, VPI,
CPI Holding, Cardinal, BPAC II and                         Southeast, Midwest, NIM, Plastics
Trustee                                                    U.K., Knight, Norwich Acquisition,
                                                           CPI Holding, Cardinal, BPAC II and
                                                           Trustee
</TABLE>