The trick is to give the bottle a vigorous single shake before opening it, so the air is at the end away from the nozzle. Then there's no splattering.
Re:Food Packaging
by LargoLasskhyfv on Friday March 18, 2022 @10:41AM
(#30722878)
McDonalds does that with cardridges in a (don't know the exact word) squeeze gun, and it mostly comes out in the same volume. They also had funnels for ketchup and mustard, where you pushed once, and got more or less the same amounts per push.
Solving the leaky bottle upside down problem is too narrow a focus.