Bill Kissner mentioned something like this on a thread once....for some reason it popped into my head today...
Nothing scientific at all, and I know it's not a real critter...but like I said, interesting....
Best to do this over a big sink or better yet a bath tub...
Get two zip-lock bags and fill them with water(I used sandwich sized bags, but anything as big or bigger will be fine) as close to the same amount as you can.....
Now, here's what I did....I got a Zwickey Eskimo 2bl. and a 3 bl. 160 Snuffer, and an old wood shaft to just stick them on the taper, no glue so I could switch them....
I held one of the bags on the top by the zip-lok and stabbed the bag low,close to the bottom... in one side, out the other...then quickly pulled it back out...water poured out pretty fast....
Popped off the Zwickey, and pushed on the Snuffer...
Then I held up the second bag, and plunged the Snuffer in and thru...the water literally exploded out of the holes! That's why I say now a bath tub might be better! I mean so fast the the bag collapsed on itself before I could even get the bh back out!
Like I said, nowhere near scientific. Not a real animal with skin, muscle, and bone......but......
Try it with whatever bh's you have, I think you'll be impressed by how quick a big multi blade will empty the bag.
Take from it what you want...