Water sales strong - But can we get them to work in vending machines?

Why are the bottles at the discount clubs so flimsy made?
Vending machines vend water bottles but the ones found at discount clubs are so flimsy they jam many times.

http://www.reuters.com/article/2012/03/13/us-food-summit-nestle-idUSBRE82B1BG20120313

Vending Plastic Bottles Of Water - BAN on college campus

Is it just the fact that it is water being sold or is it the fact that it is in a plastic bottle? It looks like the ban is just because it is water and that is absurd If people want to choose to drink water and other flavor waters or different brands of water because they like one taste over tap water they should have the right to buy those and drink them where they want..
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