About this item【Food-Grade Material】 The tumbler with straw and lid are made of borosilicate glass, free BPA and lead, and are heat-resistant. They can withstand temperatures ranging from -4°F to 248°F, without breaking even with significant temperature differences. Additionally, they are dishwasher safe【Sealing Glass Lid】 - Our glass lids do not have the same defects as the bamboo lids, ensuring the durability and clean of the lids. The sealing ring ensures a tight fit, and the transparent nature of the lids makes them perfect drinking cup for brewing sun tea【Easy to Clean】 The reusable tumblers, which are resistant to high temperatures, can be safely washed in a dishwasher. Furthermore, the tumblers come with a straw brush and a tumbler brush, allowing easy removal of residues and effortless maintenance of cleanliness【Versatile】 Whether it's coffee, tea, juice, smoothies, protein shakes, or other heat / ice beverages, this bottles can perfectly meet your needs. The glass material prevents the retention of metallic or plastic flavors, preserving the original taste of your drink【Unique Appearance】 The 20oz glasses cup feature an exquisite embossed design that combines practicality with aesthetics. The textured surface provides non-slip effect, reducing the likelihood of slipping and falling. These elegantly shaped glassware make the perfect gift for any occasion or event, offering a beautiful hydration gift for your family and friends