Quality material: the bubble tea cups are made of high-quality borosilicate glass, lead and BPA free, resistant to sudden temperature fluctuations between -68 °F and 212 °F and are dishwasher safe. Cocktail glasses are safe, environmentally friendly and reusable, so you can store your drinks with confidence.Note: beads cannot pass through straws Glass set: the glass with lid and straw contains 6 x 500 ml glass can moulds, 6 x bamboo lids, 6 x reusable glass straws and 2 x straw cleaning brushes. A classic design and a very practical combination set. Multi-purpose: the drinking glass with straw and lid is suitable for any occasion, all hot and cold drinks, and can also be used as a very practical and beautiful juice glass gift cup. Cocktail glasses are very popular in households, kitchens, cafes, bars and restaurants. You can use the glass tin mould to make the perfect cocktail glasses, tea, iced coffee, smoothies, juices. Easy to clean: drinking cups with straw are cool and freezer-safe and easy to clean. Simply rinse it under warm water or put it in the dishwasher. We also have a straw cleaning brush to save time and effort (A small reminder: if the lid made of natural bamboo is not used for a long time, please keep it dry.) We strive to improve the quality of our products. If the cocktail glass set is not perfectly damaged or you have any questions about the glass with lid and straw, please contact us and we will offer you the perfect solution.