A device to contain and deliver fluid substances, comprising: - a container (2, 2') comprising a housing (20, 20') suitable to contain a substance to be delivered, said housing (20, 20') having a bottom wall (21, 21') and at least one side wall (22, 22') delimiting an opening (23, 23'); - a feed element (3, 3') to feed said substance (S, S') outside the container (2, 2'), having a piston portion (4, 4') suitable to be inserted inside said housing (20, 20') of the container (2, 2') and to sealingly slide against said at least one side wall (22, 22') so as to exert pressure on said substance (S, S') contained in said housing (20, 20') of the container (2, 2'), and a conveyance portion (5, 5') connected to said piston portion (4, 4') having at least one channel (50, 50') to convey said substance (S, S') outside said housing (20, 20'); - a dispenser cap (6, 6') comprising a connection element (65, 65') for said channel (50, 50') of the feed element (3, 3'), with at least one pipe (60, 60') for said dispenser cap (6, 6'), one dispenser mouth (61, 61') for said substance (S, S'), connected to said pipe (60, 60'), and one actuation portion (62, 62') suitable to be hand-operated in order to manually handle said feed element (3, 3') so as to push said piston portion (4, 4') into said housing (20, 20') of the container (2, 2') and deliver the substance (S, S'); - at least one guide element (7, 7') to guide the handling of said piston portion (4, 4') into said housing (20, 20') of the container (2, 2'); - wherein said piston portion (4, 4') of said feed element (3, 3') is handled only manually by acting on said dispenser cap (6, 6'); said device being characterised in that said guide element (7, 7') comprises a rod (70, 70') extending from said bottom wall (21, 21') of the housing (20, 20') of the container (2, 2') and suitable to be inserted in said channel (50, 50') of the conveyance portion (5, 5') of the feed element (3, 3'); said rod (70, 70') comprising at least one duct (71, 71') through which the substance (S, S') to be delivered flows. - a container (2, 2') comprising a housing (20, 20') suitable to contain a substance to be delivered, said housing (20, 20') having a bottom wall (21, 21') and at least one side wall (22, 22') delimiting an opening (23, 23'); - a feed element (3, 3') to feed said substance (S, S') outside the container (2, 2'), having a piston portion (4, 4') suitable to be inserted inside said housing (20, 20') of the container (2, 2') and to sealingly slide against said at least one side wall (22, 22') so as to exert pressure on said substance (S, S') contained in said housing (20, 20') of the container (2, 2'), and a conveyance portion (5, 5') connected to said piston portion (4, 4') having at least one channel (50, 50') to convey said substance (S, S') outside said housing (20, 20'); - a dispenser cap (6, 6') comprising a connection element (65, 65') for said channel (50, 50') of the feed element (3, 3'), with at least one pipe (60, 60') for said dispenser cap (6, 6'), one dispenser mouth (61, 61') for said substance (S, S'), connected to said pipe (60, 60'), and one actuation portion (62, 62') suitable to be hand-operated in order to manually handle said feed element (3, 3') so as to push said piston portion (4, 4') into said housing (20, 20') of the container (2, 2') and deliver the substance (S, S'); - at least one guide element (7, 7') to guide the handling of said piston portion (4, 4') into said housing (20, 20') of the container (2, 2'); - wherein said piston portion (4, 4') of said feed element (3, 3') is handled only manually by acting on said dispenser cap (6, 6');