Now you can use tallboy (16 oz) and regular (12 oz) drink cans in the same coozie! This is an insert for 16 oz can insulators (Yeti, RTIC, Toadfish, etc) that allows you to use a 12 oz can inside! I fill the inside of the insert 3/4 full of water and freeze it, which keeps the 12 oz cans ice cold to the last sip! I use the 16oz coozie with 12oz cans just so I can take advantage of this. Or you could use it to store/hide things. The lid screws onto the body allowing you to dial in the fit of your drink by screwing the lid on tighter for a looser can fit, and vice versa.

I keep a couple of these in my freezer, and throw them in the cooler with my drinks when I go out. Bring one coozie, and keep your drinks cold.