Reusable Premium Material: These straws are made of high borosilicate glass. environmentally friendly,dishwasher safe, reusable,Be high strength, stiffness, hardness and good resistance to mill. Thus, there will be no metal aftertaste, no leave aftertaste from your last drink.Do something for protecting the environment.Glass straws have a higher level of protection for our health and living environment. Prefect for Drinks: glass straws drinking reusable with outer diameter of 0.4 inch can easily fit through the lid slot of your mason jar, , glass tumbler etc.Suitable for mason jar cup, various tumblers, bar glass and more glass cup. Perfect match for beverages. Convenient Cleaning: Our reusable straws can withstand 150 high temperature and -21 low temperature. The straws can withtand heat so they are safe to place in the dishwasher for a complete. Shatter : High borosilicate has anti-crushing function after strengthened, making it both safe and to drink from. The edges of our straws are smoothly handmade, no need to worry about hurting your mouth. The straws are suitable for smoothies, beverages, coffee, lemonades, shakes, milk tea, cocktails, hot chocolate, juices, wine and other liquids. Colour: transparent Material: glass Size: 8x200mm Package Contents: 12 * Reusable straws 4 * Cleaning brushes Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.