The 12 oz. Stainless Steel Fluted Travel Tumbler by Planet Zak from Zak Designs is one durable tumbler that will keep your favorite beverage at the perfect temperature. Designed with utility and versatility in mind, it is durable and won't retain past flavors or odors. Constructed with vacuum sealed double wall insulation along with the insulated lid for improved thermal efficiency; this tumbler will keep drinks hot for 4 hours or cold for 11 hours. 12 oz. Fluted Travel Tumbler has vacuum sealed double wall insulation which improves thermal efficiency; keeps beverage hot for 4 hours or cold for 11 hours. Insulated lid has one hand operation for easy drinking; the innovative liquid lock technology creates a leak-proof seal when lid is closed Tumbler fits under most single serve brewers and fits in most car cup holders; lid disassembles for easy cleaning; perfect for use at home or on-the-go Dishwasher safe, but hand washing will extend life of tumbler and lid; do not microwave International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. Temperature retention test results have been provided by an independent 3rd party testing facility. The lid has one hand operation for easy drinking; open when button is depressed and closed when button is released; the innovative liquid lock technology in the lid creates a leak-proof seal when closed. The tumbler will fit under most single serving coffee brewers and fits in most car cup holders, making it perfect for use at home in the office or on the go The lid is easy to disassemble for cleaning; dishwasher safe, but handwashing will extend the life of the tumbler and lid. The stainless steel and plastic are BPA-free. The colors are trend right and match back to popular vehicle colors. Made by Zak Designs, a company that offers travel ware and products at the forefront of trends for con