We made a big ass 20oz glass tumbler for a technical reason. Glass has a thermal conductivity of 0.8 W/(m⋅K), which is a little more than 10 times that of plastic. So it keeps your iced coffee colder for 10 times longer than a plastic tumbler.
This custom tumbler is made from double-wall, high-Borosilicate Glass, features a push-on lid with a flip-top closure piece, includes a colored polypropylene straw that measures 9" in length, and a silicone seal ring to prevent leakage, and keeps the lid in place. Designed to fit into most cup holders.
High Quality! Love the design. Love that it is glass. Easy to use and easy to clean. Obsessed!
I use my tumbler for my coffee or tea every morning whether it’s hot or iced. I’m obsessed! Durable, fun, and cute :) whenever my brother visits he also goes for this cup when I’m not using it so I’m here to buy him one!
This tumbler is very high quality and keeps my cold brew really cold. Environmentally friendly container that I can see through when mixing my is great! I love the convenience of taking my brew wherever I go. The Big Ass graphic rocks!