The MiiR bottle's one-twist lid and perfectly-sized opening make your daily hydration effortless. Vacuum-insulated technology keeps your water cold through heated-yoga classes or in your car on a hot day (and easily fits in your cup-holder!) Hot drinks stay steamy on those wintery days. The strategically sized opening is wide enough to fit ice cubes yet narrow enough to go for a chug without getting a water beard. Patented design. As if you needed another reason to love this bottle, MiiR invests proceeds from every bottle to provide one person in need with access to clean water. To prove their impact they include a coded bracelet that unveils GPS coordinates and photos of the well project you help build. Transparency is a beautiful thing.