When I ran stacks, I had two plastic buckets that I used from Wally World with bungee cords for tie downs. Whole deal cost less than $20.

Didn't look like much more than the red neck engineering that went into it though!

 

i heard we were geting 2 storms back to back with only like 6hours in between so i wont drive my truck home i take the work truck so i can head right out when called so i was like there saying 2 feet my stack prolly would have over flowed if i ididnt put a bucket on. i just use a 5gal bucket just drop it on.