dwh
Tail-End Charlie
My solution is sortof along the same lines as dwh's.
I just go to my local Costco and buy the 2-packs (boxes) of Arrowhead 2.5-gallon spring water jugs for a hair over $4. Each jug already has a spigot on it too. Just toss a box (5 gallons) in the truck and go.
The jugs are somewhat more fragile than the Arizona tea bottles (thinner), but kept in the box they seem to hold up reasonably well (and once empty I just recycle them, so each trip starts out with new ones). As an added bonus, the heavy corrugated boxes they come in work great for organizing some of my other supplies too.
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I've used those in the past. IIRC the two problems that turned me off were that to get a good flow, I had to punch a hole in the top with a knife, and not refillable.