This is our double-walled durable SAN acrylic Dockside tumbler. The insulation design provides excellent temperature retention with no sweating. It's great for hot and cold drinks, totally versatile! Enjoy on-the-go while tailgating or relaxing at the pool in style. It's lid design prevents spills on choppy oceans or while carting down the golf court. Keep bugs and dirt from getting in your drink while relaxing at the beach or in the garden. Cheers, folks! BPA-Free. Designed in the USA. Made in China.