Screw cup: Beach Mug made especially for the beach.
It's got a screw-shaped bottom, by turning the mug just like a screw, the device can be secured into the sand. A practical solution for sandy and windy conditions at the beach, when dug into the ground added another advantage: even keeps the drink cold because the ground is cool beneath the surface.
S - Small
Technique: slip casting
Dimension: ∅74 X 127mm