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. Also includes is a bamboo lid with silicone to prevent water damage and those ugly black spots no one wants. Details: Available in multiple colors 20 oz. Non-Slip Sleeve Leak-proof coverage Glass tumbler with silicone sleeve Care & Usage: Easy to clean Dishwasher safe (glass and straw only) Temperatures: fridge safe, boiling water safe, freezer safe