This cup with straw is slim enough to fit in your car cup holder, and it's made from Borosilicate glass so you can enjoy drinks hot or cold. You won't burn your hands or worry about condensation on these glass tumblers because the silicone sleeve has you covered. We've also covered the inside of bamboo lid with silicone, to prevent water damage and those ugly black spots no one wants. The More Hygienic Glass Cups with Bamboo Lids and Straws When it comes to cold cups with lid and straw, have you noticed how bamboo lids get water logged and gross. Well, the silicone gasket on our clear cups with lids and straws runs right to the edge for spill proof protection and bone dry bamboo. Ice coffee cup, aesthetic water bottle, smoothie container or travel cup with straw. No matter what yours is destined for, Drink for Joy with a JoyJolt bamboo tumbler glass.