These tumblers have a NASA, I Need My Space Design. Choose from a double-walled, insulated BPA-free polymer or a triple insulated and copper lined stainless steel version featuring double wall vacuum insulation and 18/8 grade steel that will maintain your drinks temperature longer. Keeps drinks cold for up to 24 hours or hot for 8 hours. Various sizes available. Made in the USA since 1946. Microwave/Dishwasher safe. Lifetime Guarantee. REDUCE, REUSE, RECYCLE! The Tervis Story "What started in 1946 as a company that made an innovative plastic tumbler became a mission to change the world. Whether they’re partnering with Florida-based marine research labs, recycling their products into other post consumer products to keep them out of landfills or doing company-wide beach cleanups, they are very protective of our oceans. They want to keep our backyard clean. The Tervis mission is simple - to take responsibility for their products they put out there instead of leaving the burden on you." #FillThisNotOceans
