You didn't know you needed these 4-inch manhole/sewer cover style drink coasters, but you do now! Some classic manhole cover designs are the perfect rests for drinks at your next party, or just everyday use. Someone will say "Hey, that looks like a manhole cover!" and you can say "That is because it is!". And then you can stare at each other blankly until one of you goes back to scrolling on their phone. Since these are cut designs, they are not meant to be used with cork bottoms; however, if you would rather engrave, then are some pre-cut adhesive-backed 4" cork linked in the supplies.