Double walled and vacuum insulated, 10 oz insulated stainless steel water bottle that keeps drinks up to 8 hours Hot & 12 hours Cold. Perfect for summer trip, long bicycling and hikes, all sports, running, beach, yoga, golf, camping, daily use and so on. It also can be used as a gift for child, family member, friends and lovers. The screw design will not leak or spill beverages from the inside. Our vacuum insulated water bottle uses food grade, 304 stainless steel, silicone sealing ring, BPA-free, recyclable & reusable materials, provides a pure and good taste. Safety for kids / children.