Color Name:Grey Borosilicate bottles all of our products are designed with three values in mind: Simplicity, functionality, and responsibility. Simplicity, for a beautiful, clean aesthetic that begs to be enjoyed. Functionality, for ease-of-use that can always be relied upon. And responsibility, for products that are manufactured under fair and equitable conditions. Features - durable and safe borosilicate glass - rust-/leak-proof cap - leak-proof lid with convenient carry loop - insulating, protective, non-slip silicone sleeve - wide-mouth opening. Care - avoid shaking bottle with too much force when it contains hard articles. - Do not damage the rubber ring inside the cap. It is essential to leak prevention. - We recommend you wash by hand. Ditch the plastic, go glass femora borosilicate glass water bottles are handmade from borosilicate glass, the gold standard for safe, clean glassware. It's ultra-clear, durable, and temperature resistant. Free from boa, lead, and other toxic chemicals, you can be sure that our bottles are healthy not only for you, but for our planet as well.