- Find 2 cans of soda.
- In the inventory, right click on one and press "Drink".
- Whilst the character is still drinking the first one, right click on the second and select "Drink".
- Once the animation finishes the first drink will stay in your inventory as a useless 0% can. Then you can drop it on the ground, producing useless item clutter.
- Right click on the second item again and select "Drink".
- After the animation finishes the can you just drank should disappear as I imagine it is meant to.