Is Guarana a Serbian brand?
Yes. Guarana is a Serbian brand.
company: Knjaz Miloš a.d., Krćevački put 26, 34300 Aranđelovac
why it is listed
Knjaz Miloš’s own contact page lists Guarana among its brands alongside Knjaz Miloš, Aqua Viva and Golf; the company is seated at Krćevački put 26, Aranđelovac.
Source: knjaz.rs
Local alternatives
Since this product is registered with GS1 Serbia, here are some Kosovo/Albania alternatives in the same category:
Golden Eagle
Frutex L.L.C., Suharekë — Kosovo
Frutex’s own site: "Frutex L.L.C was established in 1994, in Suhareka, Kosova and was set as a family business with the objective of producing and selling beverages." Its plant address is Zona Industriale Shirokë, Suharekë.
same categorySource: frutex-ks.com
Reported pairing: frutex-ks.com
GO+
Devolli Group, Istog — Kosovo
GO+ is Devolli Group’s own energy-drink brand, listed with its SKUs on the group’s brand page.
same categorySource: devolligroup.com
Reported pairing: devolligroup.com
What this means — and what it doesn't
A GS1 prefix only shows which organisation the barcode owner is registered with — not necessarily where the product was manufactured. The real place of manufacture is on the physical product's "Made in" label.