By John DeFore

The phenomenal success of single-serving bottled water is, in the eyes of most environmentalists, a scourge. Yet consumers seem slow to unlearn the habit, so a water packaged in non-petroleum-containing bottles should be a step in the right direction — right?

Doubt was cast on that recently when the popular Consumerist blog ran a post that may unsettle potential customers of the green-touting water brand Primo: When exposed to the high temperatures inside a closed car, a Primo bottle shrank to around half its original size.

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