I tested out the 40-ounce version of the Iron Flask, and my review unit came in the Black Marquina exterior finish, which is akin to a black marble countertop. Yep, the Iron Flask is rated to keep cold stuff cold for up to 24 hours, and hot stuff hot for up to 12. Ranging from a modest 14 ounces to a bladder-busting 64 ounces, each water bottle comes with three different lids for swapping between hot and cold beverages. Unlike the other caps, the Element is insulated, which is best if you plan on using this thing for both hot and cold liquids.Īvailable in myriad size and color options (6 of the former and 23 of the latter), the double-insulated Iron Flask water bottle really does have something for everyone, no matter your age, body type, or budget. My review unit had the Element lid, which has a pop-up handle. The Purist Mover bottle has three different lids to choose from: Element, Union, and Scope. Other color options are available, but they’re a lot more muted than what you’ll find with other water bottles. The stainless steel exterior is simple and elegant, yet built for some abuse it’s designed to keep drinks hot for 12 hours, or cold for 24. What sets this water bottle apart, however, is the 60-nanometer-thin glass coating on the inside, which prevents any metallic tastes (or a hint of last week’s coffee) from polluting your hydration experience. The Purist Mover, which is part of a larger collection of bottles that range from 10 to 32-ounce capacities, has an outer wall constructed from 304 stainless steel, and an inner wall made from surgical-grade, 316 stainless steel. Just because you’re using cutting-edge tech doesn’t mean the end result can’t be satisfactorily simple. + Interior glass finish prevents metallic aftertastes

Hot Water Bottle Hill by Kelvin Smith