A composition for forming a sub-ambient temperature use container, the composition comprising: from 12 wt% to 30 wt% of a modifier including: (a) from 20 wt% to 40 wt% of a block composite, based on a total weight of the modifier, the block composite including (i) an ethylene-propylene copolymer, (ii) an isotactic polypropylene polymer, and (iii) a block copolymer including an ethylene-propylene soft block that has a same composition as the ethylene-propylene polymer and an isotactic polypropylene hard block that has a same composition as the isotactic polypropylene polymer, the soft block comprising from 50 wt% to 80 wt% of ethylene based on a total weight of the soft block, and the block copolymer including from 20 wt% to 50 wt% of the hard block, based on the total weight of the block copolymer, (b) from 40 wt% to 60 wt% of a polyolefin copolymer, based on a total weight of the modifier, the polyolefin copolymer being derived from ethylene and at least one of a C 3 to C 10 alpha-olefin, and the polyolefin copolymer having a melt index from 100 g/10 min to 1500 g/10 min, according to ASTM D1238 and at 190 °C/2.16 kg, and a density from 0.860 g/cm 3 to 0.900 g/cm 3, and (c) optionally, from 0 wt% to 30 wt% of at least one of a first additional copolymer that has a refractive index from 1.490 to 1.510 and a second additional copolymer that is miscible with polypropylene, which second additional copolymer is derived from propylene and at least one of ethylene and butene; and from 70 wt% to 88 wt% of a propylene polymer base that has a melt flow rate from 2 g/10 min to 100 g/10 min, according to ASTM D 1238 and at 230 °C/2.16 kg. from 12 wt% to 30 wt% of a modifier including: (a) from 20 wt% to 40 wt% of a block composite, based on a total weight of the modifier, the block composite including (i) an ethylene-propylene copolymer, (ii) an isotactic polypropylene polymer, and (iii) a block copolymer including an ethylene-propylene soft block that has a same composition as the ethylene-propylene polymer and an isotactic polypropylene hard block that has a same composition as the isotactic polypropylene polymer, the soft block comprising from 50 wt% to 80 wt% of ethylene based on a total weight of the soft block, and the block copolymer including from 20 wt% to 50 wt% of the hard block, based on the total weight of the block copolymer, (b) from 40 wt% to 60 wt% of a polyolefin copolymer, based on a total weight of the modifier, the polyolefin copolymer being derived from ethylene and at least one of a C 3 to C 10 alpha-olefin, and the polyolefin copolymer having a melt index from 100 g/10 min to 1500 g/10 min, according to ASTM D1238 and at 190 °C/2.16 kg, and a density from 0.860 g/cm 3 to 0.900 g/cm 3, and (c) optionally, from 0 wt% to 30 wt% of at least one of a first additional copolymer that has a refractive index from 1.490 to 1.510 and a second additional copolymer that is miscible with polypropylene, which second additional copolymer is derived from propylene and at least one of ethylene and butene; and (a) from 20 wt% to 40 wt% of a block composite, based on a total weight of the modifier, the block composite including (i) an ethylene-propylene copolymer, (ii) an isotactic polypropylene polymer, and (iii) a block copolymer including an ethylene-propylene soft block that has a same composition as the ethylene-propylene polymer and an isotactic polypropylene hard block that has a same composition as the isotactic polypropylene polymer, the soft block comprising from 50 wt% to 80 wt% of ethylene based on a total weight of the soft block, and the block copolymer including from 20 wt% to 50 wt% of the hard block, based on the total weight of the block copolymer, (b) from 40 wt% to 60 wt% of a polyolefin copolymer, based on a total weight of the modifier, the polyolefin copolymer being derived from ethylene and at least one of a C 3 to C 10 alpha-olefin, and the polyolefin copolymer having a melt index from 100 g/10 min to 1500 g/10 min, according to ASTM D1238 and at 190 °C/2.16 kg, and a density from 0.860 g/cm 3 to 0.900 g/cm 3, and (c) optionally, from 0 wt% to 30 wt% of at least one of a first additional copolymer that has a refractive index from 1.490 to 1.510 and a second additional copolymer that is miscible with polypropylene, which second additional copolymer is derived from propylene and at least one of ethylene and butene; and from 70 wt% to 88 wt% of a propylene polymer base that has a melt flow rate from 2 g/10 min to 100 g/10 min, according to ASTM D 1238 and at 230 °C/2.16 kg.