Wine Tank Glass

From Random Good Stuff:

This glass makes me just drunk just by looking at it. Since we moved to Spain we got big wine drinkers not just because a glass of wine a day does you good but also because Valencian wine is just too good and cheap ;). The device consists of a bulb shaped container with the glass below. When the amount in the glass decreases, a constant amount is poured from the tank into the glass. The wine will never overflow because of the balance between air pressure and water pressure.

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