Equipment at the next size
Updated
Time the process first; in this category the answer is usually cold or filling rather than production.
Buy against measured hours
Minutes per hundred bottles for filling, capping, labeling and packing.
And hours spent waiting for something to chill, which is not labor and is still capacity.
Cold and filling
Chilling capacity first: a glycol chiller or a jacketed tank turns a half-day wait into an hour and unlocks carbonation.
A counter-pressure filler, for a carbonated product, which is the difference between losing gas on every bottle and not.
A proper capper with torque or crimp control.
A labeler, which is a large saving in finishing hours.
And more cold storage, always, which is the resource that runs out first.
Heat treatment
The purchase that changes the business rather than the throughput.
A small plate heat exchanger or a tunnel pasteurizer makes the product shelf-stable, which removes the cold chain, opens wholesale and widens the distribution radius.
It costs flavor and the live positioning, which is why it is a strategic decision rather than an equipment one.
What to resist
A larger fermenter, since capacity is vessels times turnaround.
A canning line, when mobile canning exists.
Anything tied to one bottle size before the size is settled.
And automation ahead of volume, because this category has frequent changeovers and every changeover is a full clean.