The Vapur Element ($12 for .7 liter, $14 for 1 liter, vapur.us) has to be the coolest, handiest new water bottle we’ve tested. But, here’s the catch: It’s not actually a bottle. It’s more like a thin foldable fillable water bag with a flip-cap top and carabiner tip. The Vapur is made of BPA-free plastic that’s machine-washable and lighter (weighs just 23 ounces) than a normal water bottle and way more flexible. When full, it stands up solidly and once empty it folds down or rolls up to easily fit inside your backpack or pocket.