According to a report by Jornal de Notícias, in the city of Tui, on October 31, the 12.5-kilo bottle of butane gas cost €19.55, while the 11-kilo unit of propane was sold for €17.20. On this side of the border, in Valença, the prices of the same bottles are much higher: butane gas costs €27.66 and beta gas €28.44 (respectively, 8.11 and 11.24 euros more expensive than in Spain).

Jornal de Notícias also mentions that many Portuguese choose to travel to the neighbouring country to fill up their fuel tank and take gas bottles. Some Portuguese customers even travel tens of kilometres to the Tui petrol station (noting that "a bottle of gas [pays] for the trip").

"Those who live in Valença don't use gas or fuel from there. The Portuguese all come here to Tui", said one Portuguese resident.