I couldn't find yellow cans when I needed to expand my inventory into diesel so I layed two red cans on their sides and set a horseshoe and a stick on them to make a "D" and then spray painted over them so they have a really big "D" on them. I keep 2-cycle mix in a metal gas/tool box combo which is a great item -- that way you always have gloves, safety glasses, ear plugs, and tools with you in the field. But my real inventory challenge is oil. Two different weights for ATVs, single weight for air cooled small engines, 2-cycle mix oil, bar oil, tractor oil, car oil and some I can't recall why I have it. But you gotta have it when you need it and I always seem to be checking supplies and trying to remember it when in town.