Composition for low temperature use containers

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 C3 to C10 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/cm3 to 0.900 g/cm3, 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.