Hey thank you for playing and feedback. And yes i should have and will include a clear hint about refilling the bottles by resurfacing. It is just one of those things that felt obvious when i came up with the idea so i didn't think to actually hint at it. And since you talked about it in the video, yes i also imagined countless times the player character with makeshift belt full of empty bottles that would in reality prevent him from submerging in the first place. :D