Who wouldn't want a set of Proof-O-Perk coasters to use and have on display beneath you favorite beverages?! A perfect fusion of coffee culture and digital scarcity that lets you show your love for exceptional brews and the Bitcoin revolution in style. Get either the single pack or the four-pack to best match your needs.
.: One size: 3.7" x 3.7" (9.5 x 9.5cm) .: Two shapes: round and rectangle .: Available as 1 piece or set of 4 .: Classic corkwood bottom .: Glossy and smooth surface
