Product presentation:Reusable vacuum insulation, lead-free, durable, rust-proof, less waste to the environment than plastic. Stainless steel vacuum cup adopts double layer heat preservation, so that your drink can be refrigerated for 24 hours, heat preservation for 12 hours, fresh taste. No sweat, no dew. Our insulated water bottles do not contain BPA. Make sure to provide health drinks, portable carry caps, and http://www.nuocaiflasks.com/pr....otein-shaker-bottle/