So I had a "redneck/hillbilly" thought for a few days, and finally put it to use last night. Sorry I dont have pics yet, I am at work and no access to my cell phone. I took a normal Dr. Pepper bottle, rinsed it and let it dry. Added a tbl spoon of flour. I drilled the cap to accept an automotive valve stem, cheap to buy at any auto store. I used a small 12v tire pump and added air, maybe 10-15psi is all, just till the bottle got firm to squeeze. Shake it up to get the flower to suspend in the air. Sit it at XXX range and shoot it. They make a nice little bang, and the flour gives you a visual. My daughter and I had a blast last night doing this. Here is the amazon link to the valve stems I used. I will say they are not back yard friendly if you live in a close neighborhood, but out in the sticks where I live it is an absolute blast.