Zak Designs" Travel Tumbler has a 14-ounce capacity. It features a spill proof flip-top lid and a stylish solid orange color. Made of durable plastic. Tumbler and lid are dishwasher safe. Do not use in microwave. By Zak Designs. Playful, unexpected and spirited, colorful, modern, crisp and clean-this is Zak. They offer a wide variety of dinnerware and travelware; they offer products at the forefront of tabletop trends for contemporary and on-the-go lifestyles. Stylish, efficient and well built, this mug is made for your every day.