Aquasana Premium Borosilicate Glass Water Bottles and BPA Free Lid with Stainless Steel Cover, 550ml, 6-pack Premium, Beautiful Borosilicate Glass - scientifically constructed this glass is designed to be scratch, impact, and stain-resistant, non pourous, long-lasting, and eco-friendly Bottle Your Own and keep water, juices, teas and more with you on the go Go Green & Save - filter at home, bottle your own, and take it to go - save hundreds of dollars on plastic water bottles and stay eco-friendly. Entice yourself to drink more water! Bottles are dishwasher safe Leak-Proof Solid Core Lid - stainless steel cover over BPA free lid with a rubber o-ring for a scratch-free, water-tight seal that won't damage your glass bottle over time. Lids are handwash only Add a 6-pack of desiginer silicone sleeves (not included) - the stylish, ergonomic sleeve adds durability and provides a non-slip grip by reducing condensation slippage - just choose your favorite color (B01BH1WV34)