REUSABLE PREMIUM MATERIAL: These straws are made of high quality borosilicate glass. Eco-friendly, dishwasher safe, reusable, have high strength, rigidity, hardness and good resistance to abrasion. Therefore, there will be no metallic taste, no aftertaste from your latest drink. Do something to protect the environment. Glass straws have a higher level of protection for our health and living environment. Perfect for various drinks: Reusable glass straws with an outer diameter of 0.4 inches easily fit through the lid of your mason jar, mason jar, etc. Suitable for mason jar cup, various glasses, naked glass and more glass cups. Perfect match for various 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 cleaning. Shatterproof: High borosilicate has an anti-splintering function after reinforcement, making it both safe and durable to drink from. The edges of our straws are smoothly handmade, 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 The above package contents only, 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 +/- 1-3 cm.