The tumblers are made of food-grade stainless steel for strength and purity. Unlike other travel coffee mugs that are prone to breakage, rust, and retain or transfer flavors, our insulated travel tumblers are high-quality material and clean tasting.

With double-layer vacuum insulation technology, you can enjoy cold or hot drinks. Whether you prefer hot or cold drinks, the tumbler can hold both and keep them at the perfect temperature for hours.

Each tumbler comes with an Anti-Leak, BPA-Free flip lid. The lid will prevent any accidental spills. Anti-glug hole ensures the smooth flow of water and a comfortable drinking experience. The wall layer creates a condensation-free exterior that won't sweat on your hands or in your bag.

This is a great Christmas gift, and birthday gift idea for best friend, this funny tumbler will thrill the lucky recipient!