1. Reusable and Premium Material - These straws are made of food-grade borosilicate glass, lead- and BPA-free. They have high strength, rigidity, hardness, and good resistance to grinding. Therefore, there will be no metallic taste in your drink, no aftertaste from your last drink.2. Ideal Size for Various Drinks - Suitable for mason jar mugs, various tumblers, bar glasses, and more glass cups. Perfect match for various drinks such as: smoothies, milkshakes, water, coffee, hot/iced tea, milk, and cocktails.3. Easy to Clean - Easy-to-clean straw brush that easily penetrates the entire wall of the clear straw. They are also dishwasher safe due to the borosilicate glass material.4. Please note that the glass drinking straw has a certain hardness, but it can still break if dropped on the ground. We treat every customer with sincerity and solve all problems with professionalism. Our after-sales team is always ready to guarantee your shopping experience.