| Oskars Mug Oskars Mug. Oskar's Mug is a puzzle mug. The object is to drink from the mug without spilling. The mug, however has holes at its sides, such that tilting the mug results in spilling your drink. Your best problem solving skills are required to successfully take a sip without dribbling any liquid. This puzzle combines a classic puzzle jug with a classic greedy cup. Made by Oskar van Deventer,- Oskars Mug. |