Switch to good pourers. Spill-Stop makes the industry standard 285-50 and 285-60 (wide-mouthed) pourers. They pour consistently and clean easily. There are even dust caps available. I know of no speed pourers that fit the hated Patron and similar bottles. The producers have periodically made compatible pourers available. Ask your distributor. Understand that they will most likely have a different flow than your other pourers.

The Spil-Stop 285-50 is the industry standard. The 285-60 has a larger "cork" for wider-mouthed bottles. They pour consistently and are relatively easy to keep clean. They even have available caps.

The Spill-Stop 285-50 is the industry standard for standard-necked bottles. Their 285-60 is the wide-mouthed equivalent. They pour consistently, clean relatively easily, and are tanks. They're also readily available on Amazon. 285-50 & 285-60, along with a dust cap.

The Spill-Stop 285-50 is the industry standard for reasons. The 285-60 is the wide-mouth equivalent and pours identically. They even sell caps that fit both.

Squeeze bottles are you answer. OXO makes them in three sizes, 6oz, 12oz, and 16oz. Of course, Amazon has many options listed, at all sizes and price points. Otherwise, champagne or olive oil bottles, along with Spill-Stops, if needed, work great. Olive oil bottles will run from 8oz to 32oz.