Um, Ms RedEye, you put the pipe in the bag and hold the pipe. The bag is to recycle the liquid. I only use this technique with pipes too small to pour liquid in and shake it around. Be sure you have a good grip on the pipe before shaking it. This method is only for those too impatient to wait for the alcohol to dissolve. A good sandwich bag will hold a light weight pipe no problem, but don't go crazy.
I like 420 solution better than salt and isopropyll alcohol. They make an organic, citrus solvent which contains tiny pieces of silicone or something. The package says it can just go down the drain and I've never seen a drain get clogged by it. I think the ultra small pieces are good for reaching the small nooks and crannies. The pumice is good for coating pipe cleaners. Using a bag uses just a fraction of what you would use trying to pour tiny amounts into a small pipe. However, pouring all that silicone down the drain might not be the best idea. So now the question is, can our water treatment facilities handle silicone better than estrogen?
If I'm musing about water treatment facilities, I must be stoned and heading back to bed. Damn insomnia.