Having survived many bouts with this, I no longer fear any beer:
Bao Me Ba (phonetic spelling), with the distinctive "33" label, a delightful brew made with pure DaNang river water (the sewer of southeast Asia).
While in Vietnam we were limited by military orders. Four cases of beer per month, or 4 quarts of liquor (not both), with a ration card required for purchase at the PX 'Class 6' stores (only in secure rear areas where many of us seldom had occasion to go). Beer was usually available (Schlitz, Red Stripe, couple of Filipino brands, occasionally Japanese brands) priced at $2.40 per case. When available, liquor such as Jim Beam, Canadian Club, and other popular brands were priced at about $1.90 per quart. Everything was tax-free (no Federal excise taxes, no state taxes, etc) so we got a real education in the effects of taxation on retail pricing!
While I was in Vietnam the price of cigarettes (popular brands) went up from $1.70 to $1.90 per carton (also tax-free), and this nearly caused insurrection in the ranks (we were limited by rationing to 4 cartons per month).
The "buddy system" helped a lot. A non-smoker could easily trade his cigarette ration for another guy's liquor ration. The black market took care of most other needs, probably better than any military supply lines (and the rationing system was largely enforced as a means of curbing the black market).
Another story entirely could be told of the corruption within the military clubs system (officers clubs, NCO clubs, enlisted mens clubs), with dozens of high-ranking NCO's and officers going to prison for trafficking in liquor, beer, cigarettes, and other essentials.
Worst beer I ever had was pretty good at the time, even when it cost more than it should have and no ice was available.