I have seen those Primo 5 gallons bottles at local big box stores around here. They are all #7 bottles and do not say BPA free on them. I haven't seen any 3 gallon ones, but I will keep an eye out.
Thanks for the heads up. Picked up 2 today. Plan on splitting batches to test out diff yeasts, dry hops, etc.
I stopped by the Target by me today and they have some of these that look exactly the same and for the same clearance price...
BUT they are #7 and not BPA free. Make sure to check the bottom before assuming it's the same as the OP.