20 oz. vacuum bottle is made of food-grade high-quality 304 stainless steel. Our Bamboo top lid & Stainless Steel lid both have no plastic. This creates an all-stainless steel interior. No plastic contacting your drink means you can rest assured that the taste & your health are not compromised. Utilizing Thermal Insulation Barrier Technology means you won’t get annoying condensation on your bottle, which can make your drinks stay icy cold or piping hot for longer!