Arcane Stool

This item appears to be a simple round flat wooden coin with a emblem of a beer mug on it. If the dwarvish word for "Sit" is used, the coin becomes a barstool that raises the holder of the coin to the height of the bar.

If the dwarvish word for "Stand" is used, the stool safely puts the occupying creature on the ground and returns to being a wooden coin.