Yet another crazy idea

So I was browsing the bike department at Canadian Tire when I remembered that you could buy water holding backpacks, like the one in the picture. I don't know if it was the thirst for water or the thirst to create something but I ended up buying one because I figured I would be able to convert it from a water dispenser to a motherfucking backpack bong! I am going to start construction on this sometime soon which will mean I will have to lay off on the boxing bag bong idea. It will be worth it though because the idea of being able to take a hit from a massive bong while riding a bike or something is blowing my mind at the moment. I will post pics when I am done.