Nalgene Wide-Mouth Bottle

Nalgene's wide-mouth bottle has been around since the 1970s, when it was lab equipment. College students now carry the exact same bottle to lectures that chemists used to measure solvents. That says a lot about how good design outlasts its original context. The opening fits ice cubes or a sponge for cleaning. Its translucent body lets you see exactly how much water you have left, which matters more than you'd think when you're deciding between refilling now or after class. I started using one because my friend left hers at my apartment and I never gave it back. Six months later, it's survived being dropped on concrete, frozen solid in my car, and used as a makeshift rolling pin. Milliliter markings on the side are a holdover from its scientific origins, and I actually use them to track daily water intake. The cap screws on with a satisfying click, and the loop lets you clip it to a bag without worrying. These bottles are still everywhere on every campus despite all the insulated competitors that have come out since.