Ideal for hot/cold drinks, smoothies, cocktails, frozen drinks, shakes, iced coffee, iced tea, etc. Made of high quality borosilicate glass, environmentally friendly, without metal aftertaste, dishwasher safe, reusable. Suitable for the standard openings for straws. The high-quality glass straw set made of borosilicate glass is not only an elegant addition to a host's kitchen, but also the perfect way to enhance the look of a great drink for guests. They not only look chic, but are also pleasant, functional and environmentally friendly. Thanks to the glass wall thickness and the included storage bag, the reusable drinking straws are also durable. Cheers.