REUSABLE PREMIUM MATERIAL: These straws are made of high borosilicate glass. environmentally friendly, dishwasher safe, reusable, have high strength, stiffness, hardness and good resistance to milling. Thus, there will be no metal aftertaste, no aftertaste from your last drink.Do something to protect the environment.Glass straws have a higher level of protection for our health and living environment.Prefect for various drinks: reusable glass straws with an outer diameter of 0 .4 inch can easily fit through the lid of your mason jar, mason jar, etc. Suitable for mason jar cup, various glass, bare glass and more glass cup. Perfect match for different drinks. Convenient cleaning: Our reusable straws can withstand 150 degrees high temperature and -21 degrees low temperature. The straws are heat resistant so they are safe to place in the dishwasher for a complete. Shatterproof: High borosilicate has anti-shatter function after reinforcement, making it both safe and durable to drink from. The edges of our straws are smoothly handcrafted, you don't have to worry about hurting your mouth. The straws are suitable for smoothies, drinks, coffee, lemonade, shakes, milk tea, cocktails, hot chocolate, juice, wine and other liquids. Color: transparent Material: glass Size: 8x200mm Package contents: 12 * Reusable straws 4 * Cleaning brushes Only the above package contents, 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 permitted measurement error is +/- 1-3 cm.