A new kind of 3D printer called Beer Ripples allows bartenders, servers and event planners to customize beer by printing a message, selfie or image onto the top of a foamy pint in a mere 11 seconds. The malt-based ink won’t affect the beer’s taste, and uses inkjet printing techniques to print the image you send to the device via its mobile app. Check it out in action below — what would you print on beer, given the rare opportunity?