Body inflation

I was figuring out what kind of "suit" the YouTuber, Dragongut, has to fill it up with water? Here is one of his water inflation videos down below.

I tried to research what possible methods that might've work. I thought maybe he used a weather balloon. However, I've discovered that could eventually popped easily. I then thought about a water pillow although I don't think it will produce a round shape?

If anyone has done this before, I will love to know the secret! I am eager to try this on my partner in the future.

I've discovered that beach balls are resistant from popping when filled up with water until it gets very large at a certain point. Another con is it could leak eventually. Learned all this from this science experiment video.

If I were to do this method then me and my friend then we will have to be in the bathroom. Just like the guy in the previous video.

You could try a trash bag -- I've used those large black 30-gal bags a lot for my padding setups, but I've also used em in the shower & pumped em full of water.

They *generally* don't leak, but you can test its airtight-ness (get a bunch of air in it and squeeze to see if any air escapes) before doing it with water. Double-bagging is another way to protect your house from water damage lol. I'd recommend doing it in a bathtub or shower though just in case.

Have it under a layer of shapewear, and maybe put a belt on over top of the shapewear and lower than the bag to make sure the bag doesn't fall through - it gets *heavy*. You'll also probably want to tie or duct tape the bag opening over the hose so that no water spills out the top