Whatever the mechanism might be—UV degradation, shampoo corrosion, planned obsolescence (just kidding, Nalgene)—I’ve concluded that white HDPE Nalgene bottles seem to have a finite, potentially annoying or even hazardous, life expectancy.

How long do Nalgene bottles last?

In my experience, the poly (white) Nalgene bottles last +/- 5 years, depending on use & UV exposure. They develop a smell I find unpleasant, & then crack if flexed.

Is my old Nalgene safe?

What the FDA found in these old Nalgenes is enough to make you run for the hills. Bisphenol A (BPA), a highly toxic chemical and plastic additive, “makes plastic more rigid and unbreakable,” according to Schapiro. Nalgene stopped making bottles with BPA at the price of super-durability, and now we’re safe.

Leanne Stapf, The Cleaning Authority’s CEO, told PopSugar that “plastic water bottles can start to break down after continued use and need to be replaced about once a year.” Gym-goers and other people with an active lifestyle tend to choose stainless steel or sturdy plastic water bottles compared to the glass variant.