Here is a punishment I gave to MissMaria on GD:
Drink a litre of water. Get naked if you aren't already.
Fill a bowl with water, for two hours this will be all you can drink, on all fours lapping up the water.
This (bowl) is also where you will pee.
Drink from the bowl until the two hours are up.
However, for you I think you should drink 2 litres of water and I think you should roll a die and multiply the initial 2 hours by the number you roll.
I would love pics of you:
drinking water,
lapping up the water from the bowl &
peeing in the bowl