"Purchased 6 to use on 5l car shampoo and valeting products. All fit perfect....examples :powermaxed tfr ,demon snow foam and no nonsense shampoo. The thicker products dispensed well, the more liquid ones suffered a few drips afterwards. Overall good quality and work well ,saving product wastage in the transfer process. And getting a funnel out. Cannot comment on reliability and how certain chemicals may affect long term performance. But for a first go happy with car shampoo and a bit less so with tfr (like water )."