This 2.5 litre bottle is the bulk Addicts Range size of Dunking Biscuit's Feelin' Bubbly pH Neutral Shampoo, using the same high foaming, anti-marring, pH neutral formula as the standard 500ml bottle. The maker lists it as matte safe and vinyl wrap safe, and states it will not compromise existing waxes or sealants, so it suits owners who wash regularly and want to avoid running low mid-season. Dilution is 20 to 30ml per 20 litre bucket, giving up to 125 washes from one bottle, with the same Tutti Fruity scent as the smaller sizes. Many owners decant this size into a smaller mix bottle for everyday use and keep the large bottle as backup stock in the garage.