Help my valves?
I need to figure out how to make a check valve... using household products! You see, I have no balloon, and even balloons only work for a little while. I was thinking it would be really funny to use a whoopie cusion as a check valve... it would fart all the time. So, a check valve is a valve which lets liquid/gas (gas for my purpose) out in one direction, but will not allow it to come in the other direction. With the balloon, it stretches and fills up with gas, but it can only stretch so far. So, get to them ideas... I probably won't get any ideas, but I am tired and dillusional.