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One of many reasons to choose a metal water bottle is durability.  All our BPA free bottle manufacturers make claims about durability.  But how well do they hold up?

Each time we start carrying a new line, we choose a bottle to subject to daily use for product testing.  These bottles accompany us on trips in the car, on the bike, and abroad.  We do not intentionally drop or scrape the bottles, but also do not intentionally protect them with a carrier.

Read our comments below on bottles we used daily for 6 months or more.

The SIGG bottle loses the wear and tear test.  The aluminum material dents and scratches easily. Even though this is my daughter’s bottle, I admit to dropping this bottle once with the resulting dent on lamb’s belly:

dents on sigg bottle

dents on sigg bottle

More worrisome is that the lining around the rim and paint where the screw tops is scratched off from all our tested SIGG bottles.  The lining is there to ensure taste neutrality, and while we haven’t noticed a taste difference, it is troubling that it scrapes off so easily.

paint and liner scratches on SIGG

paint and liner scratches on SIGG

Finally, we notice significant wear on the active bottle top.  The etches here collect dirt and can scratch lips too.

bite marks on SIGG active top

bite marks on SIGG active top

Klean Kanteen and Nathan Sports stainless steel bottles have held up much better.  With over six months of daily use, there are no dents on our Klean Kanteens or Nathan bottle.  The Klean Kanteens have some hairline scratches that are barely visible on the stainless surface.

Klean Kanteen surface after 10 months

Klean Kanteen surface after 10 months

The paint on the Nathan bottle is worn where it rubs on the bike water bottle cage.  This bottle is used daily at home and on frequent cycling trips.  The steel surface revealed underneath has proven to be stainless.

Nathan Sports bottle wear

Nathan Sports bottle wear

The tops on both Klean Kanteen and Nathan show little to no wear.  Interiors are like-new as well.

(We will update this test when we have used Guyot Designs and EarthLust bottles for six months.)

How are your bottles holding up?

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