Tree-free greetings strives to use the best materials and processes possible. The tree-free greetings sip "n go travel tumbler is made of premium quality stainless steel with a curved acrylic outer. Bpa free and proposition 65 compliant, this durable tumbler holds 16-ounce of your favorite hot or cold beverage and comes in numerous hard to find collectible quality art designs. Handwash only, the sip "n go travel tumbler makes the ideal gift for any occasion. Save trees and spread joy. Buy a tree-free gift today.free