This water bottle is made of food-grade double wall stainless steel and bamboo, keep hot/cold coffee or water 8-12 hours,There are differences capacity, 12oz, 17oz, 24oz and 32oz, you can choose any capacity you want. iT also can accept to customsize your own design on it; Whether for corporate promotions, team building, or personalized gifts, this bottle caters to your needs. Complies with CPSIA.