They do work (I have two) quite well. I’m not sure why you say “vacuum insulation” though. Your can nestles in the bottom, which leaves space between the can and the sides. The rubber part at the top acts like a gasket to create a loose air seal. It can’t be tight or you’d never get the can back out. There’s no…
They do work (I have two) quite well. I’m not sure why you say “vacuum insulation” though. Your can nestles in the…