Key Features: • Made of food grade high borosilicate glass, BPA free, lead free and no metal after taste. • Eco-friendly, protect the earth and reduce plastic, elegant design, smooth straw mouth, feel comfortable when drinking. Easily fit through tall mason jar, reservist and some tumblers • Easy to clean with the included brush. You can actually see the stain inside the transparent straw. • It can withstand high temperature and low temperature resistance and has anti-crushing function after strengthened. • You can enjoy hot, cold drinks and maintain a better taste. It can be used in freezer and dishwasher.