Ocean Bottle's double wall insulation keeps your cold drinks cold and your hot drinks hot. Designed with a 360º leak proof lid, you can sip from any angle and keep your drink in your bag with the assurance that it won’t leak. These Brew Flasks are made from 90% recycled stainless steel and recycled materials and are 100% dishwasher safe - all while helping to save the ocean. Every original Brew Flask funds the collection of 1000 ocean bound plastic bottles.