Stojo products are all reusable, collapsible and made of food grade silicone – and love! They’re also free of BPAs, phthalates, lead and adhesives. Each cup quickly and easily folds down into a super-compact size, and can easily fit in a backpack pocket or purse when compressed. The 16oz Cups also come with a silicon straw, and can be used for hot or cold drinks. They also work with soup or noodles!