Cello H20 borosilicate bottle is made of clear glass which is 100% toxin free, will not release chemicals into your drink and retain freshness Designed in the most popular H2O plastic bottle shape, the glass bottle is stylish, stylish and environmentally friendly. Cello Glass bottles are strong, durable yet lightweight and travel in style in the office, in the car or anywhere you go without leaking or breaking. Borosilicate glass makes it lightweight, dishwasher safe, high heat resistance and freezer safe. The H2O borosilicate cellophane bottle comes with an airtight and leak-proof cap. With traditional thread technology and a high quality silicone rubber inside ensure your drink stays intact and won't spill or leak.