The 16 oz. Stainless Steel Fluted Travel Tumbler by Planet Zak from Zak! Designs is one durable tumbler that will keep your favourite beverage at the perfect temperature. Designed with utility and versatility in mind, it is durable and won't retain past flavours or odours. 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. 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 colours are trend right and match back to popular vehicle colours. Made by Zak! Designs, a company that offers travel ware and products at the forefront of trends for contemporary and on-the-go lifestyle.