koncentrat - sirup (bag in box) ili prašak
SR termini http://www.tehnologijahrane.com/pravilnik/pravilnik-o-kvalit...

http://archive-rs.com/page/1277320/2013-01-31/http://www.des...
sirupi za post-mix aparate

http://www.nus.org.uk/PageFiles/4888/REG-9-Beverage-Cooling....
These coolers ... cool the beer that runs in lines* from the keg through the cooler and through pythons* to the tap.
A post mix machine is a machine that makes up concentrate syrup to a drinkable beverage by mixing it with chilled water, and in many cases, carbon dioxid...

http://www.nus.org.uk/PageFiles/4888/REG-2-Glossary.pdf
Line/Lines:
The tube or pipe in which a draught beverage is passed from keg to tap via cooling equipment.
Pythons:
A bundled set of insulated plastic tubes carrying a cooled beverage (typically beer or soft drinks), they typically contain 7, 8, 16 or 32 beer lines and also contain cooling lines that are filled with cool water (soda-water in the case of soft drinks) to keep the python and its contents cool

https://en.wikipedia.org/wiki/Premix_and_postmix
Premix refers to a ready-mixed, ready-to-drink soft drink
Postmix refers to the system in which a flavored syrup (concentrate) of the soft drink is shipped to the retailer, usually in a returnable tank or a disposable bag-in-box container. At the point of sale, the soft drink is mixed to order from the postmix syrup, chilled and purified water, and carbon dioxide (from a gas cylinder), and usually dispensed from a soda fountain or soda gun.