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The compressible 8 fl. oz. humangear GoCup expands with a quick pull and collapses down small for easy packing in a purse, backpack or toiletry kit. Food-grade silicone cup is 100% leakproof. Included lid keeps the cup clean and doubles has a handy pill holder. Volume markings on the cup helps you measure fluids. humangear GoCup is BPA free and phthalate free.