1. fill a cooking pot with cans or otehr items
2. fill the pot with water
3. "drink all" (only uses up 50% btw)
4. cooking pot should now have 50% left
5. take the pot back into your hands (as the character puts it away for the animation)
6. all items inside should now also show to have 50%
7. move any item into your inventory to check the actual value