Berryman Chem-Dip Carburetor Parts Cleaner (part #0996) in the 1-gallon paint can has essentially been the same formula since 2004.  If you’re going back in time farther than that, you’re talking about our 2-phase professional cleaner.  While we cannot legally sell that product in that format anymore, the formula is still available in a 1-gallon F-style (oblong) cans as part #0901, which is intended to be used as a replenisher for our 5-gallon product part #0905.