I don't use one. Keep it away from light and in air tight containers. It works fine after 2+ years. If your container leaks fumes, you will have a problem regardless of what you put in it.
I have been using Startron for over 10 years in my boat, chain saws, and mowers when I put them away for the winter. Have never had any issues with bad gas. Two of the dealers I use for chain saws swear by it.
I use stabil marine 360. It seems to work well. I put that and some TCW3 in my boat once hunting season starts, and come march/April it fires right up.