So, I ordered a Bia Saigon and the man brought out an unlabeled bottle, see photo below.
Tasted like Budweiser. I was at Ben Thanh market: http://www.vietnam-guide.com/ho-chi-minh-city/ben-thanh-market.htm
I also bought some fermented crabs for later. FERMENTED CRABS.
It’s a busy place.