Keeping buckets in place

What types of ways have you constructed on your trailer to set buckets,chemicals,gas cans and such so that they stay where you want? I am going to have mine sitting in chemical spill trays held in place by floor mounted angle iron I think. This is for a residential open trailer, so we usually carry 2 extra 15 gal mini drums of sh, fresh wash, f13, roof snot and two 5 gal buckets of sh to handle. Any pics or suggestions are appreciated.

just google 5 gallon bucket holder, there are thosands of cool wall mount holders for horse stalls ect ect…

I pour mine into smaller, compact containers that have spouts