Expandable Ice Crystal Cooling Pack

Dimensions: 15.8 x 4 x 4 cm. Constructed from food-safe PE plastic with embedded dry ice crystal particles. No batteries or power required — activated solely by water absorption and freezing. Upon adding water, the coarse crystal particles swell uniformly to fill internal volume, creating a dense, high-capacity cold mass. After 2–4 hours in a standard UK/EU domestic freezer, it achieves stable sub-zero thermal output. The PE shell remains flexible even when frozen, reducing breakage risk during handling or transport. Use cases span regulated and everyday contexts: compliant for short-term breast milk storage, practical for office lunch cooling, supportive during postpartum recovery, functional for picnic and barbecue prep, and adaptable for last-mile refrigerated delivery where active cooling isn’t feasible.