Deluxe 600ml borosilicate glass drink bottle which features an insulating soft poly jute sleeve that helps to keep drinks cool. The sleeve is fashion-inspired textured polyester outer. It has a secure screw-on stainless steel lid which can be laser engraved with a logo. Borosilicate is a lightweight glass that is exceptionally strong and shatter-resistant. Glass is a natural choice for a clean, pure taste and is a safe and reusable plastic alternative. This product is not intended to be used with carbonated or hot liquids. It is not dishwasher safe and handwashing is recommended.