<PAGE>
                                                                     Exhibit 4.7

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                  SWEETHEART CUP COMPANY, INC., as successor to
                          Cup Acquisition Corporation,

                                   as Issuer,


                    SWEETHEART HOLDINGS INC., as successor to
                          SHI Holding Company, L.L.C.,

                                  as Guarantor,

                                       and



                      THE BANK OF NEW YORK, as successor to
                       U.S. Trust Company of Texas, N.A.,

                                   as Trustee



                            ------------------------

                          THIRD SUPPLEMENTAL INDENTURE

                        Dated as of ___________ __, 2003

                           --------------------------



                     12% Senior Subordinated Notes due 2003


 -------------------------------------------------------------------------------



<PAGE>






                          THIRD SUPPLEMENTAL INDENTURE

         THIS THIRD SUPPLEMENTAL INDENTURE, dated as of ___________ __, 2003
(the "Supplemental Indenture"), is made and entered into by and among SWEETHEART
CUP COMPANY INC., a Delaware corporation and successor to Cup Acquisition
Corporation (the "Issuer"), SWEETHEART HOLDINGS INC., a Delaware corporation and
successor to SHI Holding Company, L.L.C. (the "Guarantor"), and THE BANK OF NEW
YORK, a New York banking corporation and successor to U.S. Trust Company of
Texas, N.A. (the "Trustee"), under and pursuant to an Indenture dated as of
August 30, 1993, by and among the Issuer, the Guarantor and the Trustee, as
amended by the First Supplemental Indenture dated as of August 30, 1993, as
further amended by the Second Supplemental Indenture dated as of March 22, 2002
(the "Original Indenture"). All capitalized terms used in this Supplemental
Indenture that are defined in the Original Indenture, either directly or by
reference therein, have the respective meanings assigned to them therein, except
to the extent such terms are otherwise defined in this Supplemental Indenture or
the context clearly requires otherwise.

         WHEREAS, Section 9.02 of the Original Indenture provides, among other
things, that, with the consent of the Holders of at least a majority in
principal amount of the Securities then outstanding, the Issuer, any Guarantors
and the Trustee may amend or supplement the Original Indenture and the
Securities; and

         WHEREAS, the Issuer desires to amend and supplement the Original
Indenture and the Securities by way of the adoption of the amendments set forth
in this Supplemental Indenture (the "Proposed Amendments"); and

         WHEREAS, the Holders of at least a majority in aggregate principal
amount outstanding of the Securities have consented to the Proposed Amendments;
and

         WHEREAS, the Boards of Directors of the Issuer and the Guarantor each
has adopted resolutions authorizing and approving the Proposed Amendments, and
the Issuer, the Guarantor and the Trustee are executing and delivering this
Supplemental Indenture in order to provide for such amendments;

         NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties to this Supplemental
Indenture hereby agree as follows:

                                    ARTICLE I

                        AMENDMENTS TO ORIGINAL INDENTURE

         Section 1.01.  Original Indenture.
                        ------------------

                 (a) Sections 4.02 through 4.14 of the Original Indenture,
inclusive, and Sections 4.16 through 4.20, inclusive, are hereby deleted in
their entirety and each Section is replaced with the following: "Reserved."

                 (b) Article 5 of the Original Indenture is hereby deleted in
its entirety and replaced with the following: "Reserved."
<PAGE>

                 (c) Clauses (3) through (9) of Section 6.01 of the Original
Indenture, inclusive, are hereby deleted in their entirety and each clause is
replaced with the following: "Reserved."

         Section 1.02. Definitions. The definition of the following terms are
hereby deleted from Article I of the Original Indenture:

         "Affiliate Transaction"
         "Permitted Liens"
         "Refinanced Indebtedness"
         "Refinancing Indebtedness"
         "Replacement Assets"
         "Weighted Average Life to Maturity"

         Section 1.03. Deletion of Certain References. All references in the
Indenture and the Securities to the Article, Sections and definitions of the
Indenture and the Securities deleted pursuant to Article I of this Third
Supplemental Indenture are hereby deleted.

         Section 1.04. The Securities. Clauses (iii) through (viii) of the first
sentence of Section 12 of the Securities are hereby deleted in their entirety.

                                   ARTICLE II

                               GENERAL PROVISIONS

         Section 2.01. Effectiveness and Operativeness. This Third Supplemental
Indenture shall become effective and the amendments provided for in Article I of
this Supplemental Indenture shall become operative, immediately upon
consummation of the exchange offer and consent solicitation conducted by the
Issuer pursuant to the prospectus dated _________ ___, 2003. This Supplemental
Indenture shall terminate automatically if such exchange offer and consent
solicitation is not consummated.

         Section 2.02. Ratification of Indenture. The Original Indenture is in
all respects acknowledged, ratified and confirmed, and shall continue in full
force and effect in accordance with the terms thereof and as supplemented by
this Supplemental Indenture. The Original Indenture and this Supplemental
Indenture, shall be read, taken and construed as one and the same instrument.

         Section 2.03. Certificate and Opinion as to Conditions Precedent.
Simultaneously with and as a condition to the execution of this Supplemental
Indenture, the Issuer and Guarantor are delivering to the Trustee:

                 (a)      an Officers' Certificate in the form attached hereto
as Exhibit A-1 or A-2, respectively; and

                 (b)      an Opinion of Counsel covering the matters described
in Exhibit B attached hereto.

         Section 2.04. Effect of Headings. The Article and Section headings in
this Supplemental Indenture are for convenience only and shall not affect the
construction of this Supplemental Indenture.

                                       2
<PAGE>

        Section 2.05. Governing Law. THIS SUPPLEMENTAL INDENTURE SHALL BE
GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK,
AS APPLIED TO CONTRACTS MADE AND PERFORMED WITHIN THE STATE OF NEW YORK, WITHOUT
REGARD TO PRINCIPLES OF CONFLICT OF LAWS, OTHER THAN GENERAL OBLIGATION LAW
SECTIONS 5-1401 AND 5-1402.

         Section 2.06. Multiple Counterparts. This Supplemental Indenture may be
executed in any number of counterparts, each of which so executed shall be
deemed to be an original, but all such counterparts shall together constitute
but one and the same instrument.

         Section 2.07. Trustee's Disclaimer. The recitals contained in this
Supplemental Indenture shall be taken as the statements of the Issuer and the
Guarantor, and the Trustee assumes no responsibility for their correctness. The
Trustee makes no representations as to the validity, enforceability or
sufficiency of this Supplemental Indenture.

         Section 2.08. Successors and Assigns. All agreements of the Issuer and
the Guarantor in this Supplemental Indenture shall bind its successors and
assigns. All agreements of the Trustee in this Supplemental Indenture shall bind
its successors and assigns.

      [REMAINDER OF PAGE LEFT BLANK INTENTIONALLY; SIGNATURE PAGE FOLLOWS]


                                       3
<PAGE>


         IN WITNESS WHEREOF, the parties to this Supplemental Indenture have
caused the Supplemental Indenture to be duly executed as of day and year first
above written.


                                              SWEETHEART CUP COMPANY INC.



                                              By:________________________
                                              Name:
                                              Title:


                                              SWEETHEART HOLDINGS INC.,
                                              as Guarantor



                                              By:________________________
                                              Name:
                                              Title:



                                              THE BANK OF NEW YORK,
                                              as Trustee



                                              By:________________________
                                              Name:
                                              Title:


                                       4
<PAGE>




                                   EXHIBIT A-1


                           SWEETHEART CUP COMPANY INC.

                              OFFICERS' CERTIFICATE

         The undersigned, Hans H. Heinsen, the Chief Financial Officer, and
Dennis Mehiel, the Chief Executive Officer, of Sweetheart Cup Company Inc., a
Delaware corporation (the "Issuer"), do hereby certify, pursuant to Section 9.06
of that certain Indenture, dated as of August 30, 1993, as amended, by and
between the Issuer, the Guarantor and the Trustee, as follows (capitalized terms
herein being used with the meanings assigned to them in the Third Supplemental
Indenture dated as of the date hereof (the "Supplemental Indenture"), unless
otherwise defined herein):

         1. The undersigned have read Section 9.02 of the Original Indenture.

         2. The Issuer has received consents ("Consents") from the Holders of at
least a majority in aggregate principal amount outstanding of the Securities to
the Proposed Amendments.

         3. In our opinion, we have made such examination and investigation as
is necessary to enable us to express an informed opinion as to whether or not
the conditions precedent in the Original Indenture requiring compliance by the
Issuer prior to or concurrently with the execution and delivery by the Issuer of
the Supplemental Indenture have been complied with.

         4. In our opinion, each of the conditions precedent in the Indenture
requiring compliance by the Issuer prior to or concurrently with the execution
and delivery by the Issuer of the Supplemental Indenture have been complied
with, and the Trustee is authorized or permitted, pursuant to Section 9.02 of
the Original Indenture, to execute the Supplemental Indenture.



                            [Signature Page follows]


<PAGE>


         IN WITNESS WHEREOF, the undersigned have executed this Officers'
Certificate as of ______________, 2003.


                                       --------------------------
                                       Hans H. Heinsen, Chief Financial
                                       Officer of Sweetheart Cup Company Inc.



                                       ---------------------------
                                       Dennis Mehiel, Chief Executive
                                       Officer of Sweetheart Cup Company Inc.




<PAGE>




                                   EXHIBIT A-2


                            SWEETHEART HOLDINGS INC.

                              OFFICERS' CERTIFICATE

         The undersigned, Hans H. Heinsen, the Chief Financial Officer, and
Dennis Mehiel, the Chief Executive Officer, of Sweetheart Holdings Inc., a
Delaware corporation (the "Guarantor"), do hereby certify, pursuant to Section
9.06 of that certain Indenture, dated as of August 30, 1993, as amended, by and
between the Issuer, the Guarantor and the Trustee, as follows (capitalized terms
herein being used with the meanings assigned to them in the Third Supplemental
Indenture dated as of the date hereof (the "Supplemental Indenture"), unless
otherwise defined herein):

         1. The undersigned have read Section 9.02 of the Original Indenture.

         2. In our opinion, we have made such examination and investigation as
is necessary to enable us to express an informed opinion as to whether or not
the conditions precedent in the Original Indenture requiring compliance by the
Guarantor prior to or concurrently with the execution and delivery by the
Guarantor of the Supplemental Indenture have been complied with.

         3. In our opinion, each of the conditions precedent in the Indenture
requiring compliance by the Guarantor prior to or concurrently with the
execution and delivery by the Guarantor of the Supplemental Indenture have been
complied with, and the Trustee is authorized or permitted, pursuant to Section
9.02 of the Original Indenture, to execute the Supplemental Indenture.



                            [Signature Page follows]


<PAGE>


         IN WITNESS WHEREOF, the undersigned have executed this Officers'
Certificate as of ____________, 2003.


                                       --------------------------
                                       Hans H. Heinsen, Chief Financial
                                       Officer of Sweetheart Holdings Inc.


                                       ---------------------------
                                       Dennis Mehiel, Chief Executive
                                       Officer of Sweetheart Holdings Inc.


<PAGE>


                                    EXHIBIT B


     Matters to be Covered by Opinion of Counsel to the Issuer and Guarantor
     -----------------------------------------------------------------------


                  1. The Supplemental Indenture has been duly authorized,
         executed and delivered by the Issuer and Guarantor.

                  2. Each of the conditions precedent in the Indenture requiring
         compliance by the Issuer or Guarantor, as the case may be, prior to or
         concurrently with the execution and delivery by the Issuer or
         Guarantor, as the case may be, of the Supplemental Indenture has been
         complied with by the Issuer or Guarantor, as the case may be, and the
         Trustee is authorized or permitted, pursuant to Section 9.02 of the
         Original Indenture, to execute the Supplemental Indenture.