BruMate has perfected the art of the convertible hard-sided koozie. The Hopsulator Trio, a 3-in-1 can cooler, is designed to fit standard 12-ounce cans and tall 16-ounce cans.

The Hopsulator Slim presents a solution to a problem I hadn’t really noticed before becoming a hard-seltzer drinker: Most koozies are only designed to fit standard 12-ounce cans.

Anyone who uses a koozie should replace it with the Yeti Colster Can Insulator. It keeps drinks a lot colder for a lot longer than a normal koozie, and it's the only insulator I’ll use from now on.

Still, slim can koozies don’t hold larger cans, whereas regular 12-ounce koozies have the same diameter as many higher volume cans and can be used to partially insulate these.