Klean Kanteen Stainless Steel Flat Cap Review

Average Reviews:

(More customer reviews)I oredered this cap as an alternate cap to use with the sport cap on my 40oz bottle.Both were ordered from Amazon.

First, the new SS caps are not the same design as the original (on a KK bottle I bought that came with SS flat cap 2 years ago) the knurled edges only go around a portion of the cap and they are not as high in relief, this makes the cap a bit harder to get off, this is just a nitpick. BUT...

The real problem with this cap is what others have mentioned, water leaks inside the cap (between the plastic and SS threaded portion.I read the reviews and decided in advance I would not submerge this new cap.I washed by hand, filled my bottle a left for work.When I got there, I noticed that some of the water I had put in the bottle was now stuck in the cap,I stress that this was liquid from my beverage (water).I don't feel this cap is safe to use, and completely unacceptable - if you fill your KK with different fluids, such as juice, do you really want this liquid staying in the cap to age/spoil and then possibly re-entering the bottle.

The SS flat caps (at least this version from amazon) are a waste of money.I can't say it is the caps fault, but I also noticed rust on the thread of both the bottle and cap - it could have occurred on either one and then transferred to the other so I can't tell which is to blame.Again this was on the first day of using the bottle and cap.My two other KK bottles, one with SS Flat cap (older design) and a newer one with PP loop cap both have never had any problems.KK needs a new design for the SS caps - I would not buy these until this issue has been fixed.

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Product Description:
The perfect companion for your Klean Kanteen reusable drink container, the Stainless Flat Cap fits the 12, 18, 27, and 40 ounce stainless steel bottles securely. The Flat Cap twists on and off and properly closed, the cap will not to spill, even if you throw the bottle in the bottom of your backpack. Durable, sanitary, and non-reactive stainless steel is the material of choice among the food processing, dairy and brewery industries. The sanitary grade 304 stainless steel used in this cap also has a low nickel content, further reducing exposure to potentially irritating substances.
Manufacturer's Warranty
One-year warranty