Another classic "Why didn't I think of that?" product.
"Those irritating ringmarks that mugs and cups leave..... well, you can turn them into a nice floral pattern now with a set of Stamp Cups. The pattern on the base of the cup match up so you can join as many marks as you want."
Via: Sensory Impact
Link: Thorsten Van Elten
Designers: Valeria Miglioli & Barnaby Barford