From Hydroflask, you can expect more than just a dazzling, versatile spectrum of colors, shapes, and sizes. They provide a lifetime warranty with every water bottle sold. The 18 oz standard mouth, in particular, provides a level of hydration perfect for short hikes and daily commutes. If you gotta brave the winter cold but cant leave home without the comforts of tea or coffee, rest assured that Hydroflasks TempShield can keep beverages hot for up to twelve hours. Or if youre looking to grab water on the rocks for those hotter months, youll be looking at twenty-four hours of chill. All this, courtesy of double-wall vacuum insulation. Lining the interior is 18/8 pro-grade stainless steel that keeps water free of unwanted flavors, phthalate, and BPA.