There’s nothing that’s terribly exciting about using a coaster. When you have a drink in hand, it’s easy to forget they’re even there. If you’re a stickler for that sort of thing though, then it likely drives you crazy when chums are over and they forget to use one. No one wants a water ring on the coffee table, so you’d best find a way to remind them without sounding rude. You don’t want to start sounding like mumsy, now do you?

Instead of lecturing your friends, why not get the Lumiware Color Changing Coasters? This interesting set of four coasters can be used inside or outside, have LEDs so they won’t scald you, and are scratch-resistant. You can charge them through the included wireless induction charger, and you can change the colors. This set will cost you around $75, and won’t be easily forgotten by friends, kids, or otherwise.