Double-walled vacuum insulation is how your iced coffee stays cold in a travel mug, but it's normally only structurally stable in a cylindrical shape. The Norwegian company Oyster figured out how to transfer this technology to a rectangular cooler. The Tempo’s aluminum body is so efficient at temperature retention that it can keep food and drinks just as cold as a plastic or foam cooler while using less than half as much ice. The design also gives the Tempo very thin walls; the sides are only about an inch thick, which is about half as thick as the walls of most plastic coolers. This makes the Tempo more compact, and gives it an interior that’s much larger than you think it’s going to be when you open it. The lid clamps down with two brackets. You can undo them both to lift the lid entirely off, or (in a clever design touch) undo just one bracket so the other can serve as a hinge. The handle snaps on and can be removed entirely or replaced with a strap.
The 5-gallon capacity is enough for a half gallon of milk, a couple quart containers of pasta salad, a six pack of cans, some loose produce, and a couple of cold packs. If you stay on a liquid diet while vacationing, it holds 36 cans of whatever you’re drinking. It costs $500, which is a few hundred dollars more than most anyone wants to spend on a cooler. But if you want something compact and powerful and don’t mind paying through the nose to get it, just know that the Tempo performs well enough to earn its price tag. After a Tempo packed tightly with perishables and two freezer packs spent five hours in the backseat of a car and three hours on the floor of a cabin, a can of Spindrift soda still felt and tasted as cold as if it had spent that whole time in the fridge. —Michael Calore, Senior Editor