Buy LIFVER Drink Coasters with Holder $13.49 2. Handmade Round Slate Stone Coaster These natural slate coasters offer a sturdy base for any drink and a rustic style that’ll look great in any room.

Now, I’m following my party guests around, coasters in hand, just daring them to set down a sweaty glass for more than a second, lest I tank the value of my newly acquired table.

Phillips’ coasters are coated with a high-gloss, resin epoxy finish that makes them appear glassy. "Other coaster makers tend to use Mod Podge or a clear coat acrylic spray.

Using wireless charging and supercapacitors, he’s developing an LED coaster that can be hermetically sealed in clear resin.