500ML Ice Pack Reusable Ice Gel Block Cooling Container Water Filled Box Ice Crystal Storage Bag

PE. Coarse Particles: The dry ice crystal particles in the ice crystal box are coarse, have good expansibility, and have a long refrigeration time. After Receiving: After receiving the product, you need to add water yourself. After adding water, the ice crystal particles will swell, and after being expanded, they are frozen in a for about 2-4 hours and can be taken out for use in a lunch bag or the like. Please Note: Because ice crystals will expand during the process of absorbing water and freezing, it should be noted that when adding water, do not fill it to the full, and leave some space for ice crystals to expand. Safe to Use: The ice crystal liquid that overflows due to swelling is non-toxic and will not affect the use after simple cleaning. Extra Long Cold Storage: Extra long cold storage, can be used repeatedly