The Stojo Collapsible 20oz Water Bottle in Steel is a compact and wonderful way to hydrate. 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 sphere. They can easily fit in your backpack pocket or purse when compressed. These impressive 20oz water bottles can also be closed over your bag strap or bicycle handlebar for easy transporting. Or because they’re super soft non-fragile silcone – just toss them in the bike basket!