Hey Batz,
Why are you only after a square one? Is there a problem with using a cylindrical cooler? The 10 Gallon cylindrical rubbermaids rock - you get a nice deep grain bed that's perfect for either batch or fly sparging...
Cheers,
TL
I think the blue coolers you're refering to are called KeepCold. I'm using one of the cylindrical ones for my mash tun. Not sure how much the square coolers are but I got mine from Goliath for $90
I have a 5 gallon rubbermaid , the 3 gallon just fits with the lid screwed on , I can't fit the liquin disconnect but.
Will fit a P.O.P in my 10 gallon igloo