REUSABLE PREMIUM MATERIAL: These straws are made of high borosilicate glass. Eco-friendly, dishwasher safe, reusable, and boast high strength, rigidity, hardness, and excellent resistance to milling. Enjoy your drinks without any metallic taste or lingering aftertaste. Do your part to protect the environment. Glass straws offer a superior level of safety for our health and 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, etc. Suitable for mason jar cups, various glasses, bar glasses, and more. A perfect match for all kinds of beverages. Convenient Cleaning: Our reusable straws can withstand high temperatures of 150 degrees and low temperatures of -21 degrees. The straws are heat-resistant, making them safe to place in the dishwasher for thorough cleaning. Shatter-Resistant: High borosilicate glass features anti-splitting properties after strengthening, making it both safe and durable to drink from. The edges of our straws are smoothly handcrafted, so 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 content, other products are not included. Note: Light and different displays may cause the color of the item in the picture to differ slightly from the real one. The allowable measurement error is +/- 1-3 cm.