Review on Black Silicone Drink Coasters Set of 4 - Non-Slip 🍸 & Heat Resistant Cup Mats for Tabletop Protection & Furniture Safeguard by Tracy Pederson

Not quite the right size if using mason jars as jars. We use them for iced coffee or tea, so condensation in the summer heat is a big problem for us. It's just that these coasters aren't big enough to fit the cans all the way into the lip. They also can't handle all the moisture they've collected, which is probably due to the size issue with these jars. That's too big a glass for the size they're designed for. It's certainly better than not having a stand to protect surfaces, but we'll keep looking for something that better fits our regular glasses. They're pretty good at handling canned condensation, though. So if that's your typical usage, you'll find that they work well.