Perfect for cocktails and whisky-type glasses!   INTRO a BPA-free, lead-free and toxin-free way to enjoy your drink... because #plasticsucks! our glass straws are made of borosilicate glass and its dimensions are 6mm x 145mm. CARE INSTRUCTIONS borosilicate glass is non-porous and hypo-allergenic. it has super durability being more resistant to breaking than other glass. borosilicate is already used for high-quality beverage glassware and kitchenware (like measuring cups, coffee pots), so this is not a new type of glass. borosilicate is microwave, oven, freezer and dishwasher safe. You can heat it up to 1,500 degrees Fahrenheit before it will melt! GROWING APART? this is a classic case of everlasting love. This product should indeed last forever - always and when given proper care. however, if you do choose to say goodbye to it, our glass straws can be recycled. REPLACEMENT FOR... plastic straws! research suggests that in the USA alone they use 500 million straws a day. enough to wrap the circumference of the earth 2.5 times! instead of biodegrading, plastic degrades into smaller and smaller pieces and guess where those end? either ingested by marine or land animals. together we can change this stat - start now!