Reusable: These are definitely made from thick good quality glass,so can be reusable. Due to they are see through glass so know they are clean.It’s very durable, and its size is great for smoothies, shakes, and all drinks. Easy to Clean: It comes with an awesome cleaning brush for easy to clean the inside of the straws with the straw brush, don’t leave any kind of a weird taste in your mouth.They are also be dishwasher safe ofc. Eco Friendly & Premium Material: These straws are made of food grade high borosilicate glass, more durable than ordinary glass,high temperature resistant and breakage resistant.Be high strength, stiffness, hardness and good resistance to mill. It is also more transparent, suitable for making drinks and reuse. Drinking Straws: The size is perfect for any drink from sodas to smoothies. Perfect for Smoothies, Milkshake, Frozen Drinks, Tea, Juice, Coffee. Reusable Clear Glass Drinking Straws, 7.88" x 8MM, Bent Glass Drinking Straws, with Cleaning Brushes, Perfect for Smoothies, Milkshake, Frozen Drinks, Tea, Juice, Coffee