Get a can of beans (or water bottle/bandage), press F2 then crouch to get into the animation where your hands are behind head.
Once you are in that pose right click the consumable in your inventory and click "Eat All" then right click it again and click cancel current action, then right click it AGAIN and click Eat All again.
That's it. It won't remove the beans from your inventory and you'll still have 100%.