There has been an explosion in hydration technology over the last decade, resulting in ever more advanced vessels from which to consume our favorite beverages. Vacuum insulated water bottles are the pinnacle product in the personal-hydration market, even becoming a minor status symbol in some cases. They keep liquids hot or cold, don’t sweat from condensation, and won’t transfer heat or cold to your hand. Double-walled water bottles aren’t cheap, but their advantages outweigh the nominal increase in cost. Here are three additional reasons to consider one as your next water bottle.