So, me and Gavin were speedrunning when we just got 3 bottles by only collecting 2, i like to call that Bottle Duplication. How it works: I didn't have much time to test but based on what happened is simple, 2 or more people get the bottle at the same time to duplicate it. I managed to use it in a run. Chapter 1 - 2P, Default. Thats it. Bye

Adding something, it also happens if you click multiple times in small amount of times it also duplicates