I use the Vision 70 tubs in my RBI racks. I have 5 I think?? LOL
The Vision tubs are WAAAAAAAAAAAAAAAY better than the IRIS ones you get. They are stronger and have flat bottoms so they slide in smooth as a silk... Highly recommend and will be ordering more soon, the only negative part is the shipping is pricey and thus they end up being a little pricey in the end, but well worth it...