Not that great of an idea, but, it did come to me while I was baked...
I scuba dive, and when I go I put my tanks in the back of our jeep...they roll, not good. They sell holders for them, but, they are expensive....
So while I was stoned and in my pool floating on one of those 99 cent noodles, I thought why couldn't I buy these noodle for 99 cents each and tie them together and put my tanks in between them....hmmmmm. So I bought them and put rope in between them and have been using them ever since...
It saved me about a $100.00