sunkey 60 oz glass water bottle with leak proof lid neoprene sleeve silicone brush bpa free, large sports glass water bottle narrow mouth sunkey sunkey bottles are made from high-grade borosilicate glass which is known for its superior durability, chemical and heat resistance, and is typically used for high-end laboratory equipment and glassware, will never impart flavors or leach chemicals into your beverages like plastic and stainless steel alternatives.<br> sunkey large glass bottle series: you can find high quality 64oz/2l, 60oz/1.8l, 48oz/1.5l 32oz/1l water bottles in sunkey store, all well made and checked of borosilicate glass, leak proof.