Klean Kanteen Flat Cap/Polypro

This cap is worthless. It made my water taste bad (whereas the original ''sport cap'' never did), so I removed the silicone o-ring and put the cap in the dishwasher, thinking it had some coffee residue on it or something.

After I took it out of the dishwasher, I could hear water sloshing around _inside_ of it! It appears to be completely impermeable there are no apparent holes in it. Nevertheless it has water inside of it, with no evident way to get the water out.

The ''sport cap'' that came with my Kleen Kanteen is hollowed out, like an upside-down cup there is no bottom. This low-profile cap is hollow but has a bottom it has a continuous outer surface like a fishing bobber or something.

Clearly they need to work on their quality-control. Avoid this cap like the worthless POS that it is.

Had to buy this lid to replace the one I broke. My Kanteen fell out of the refrigerator and of course landed just right to bust off the loop cap I had. This one is great and saves a little space with it''s flat top. I hand wash all my Klean Kanteen items, as instructed, so that the water does not seep into the lids. Never let them soak or you will have water trapped in the cap. We''ve had our Kanteens for 5 years now and they have saved us from buying and wasting all those plastic water bottles. Love them!

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I like this a little better than the stainless/plastic one that originally came with my Klean Kanteen. Unfortunately, like the stainless/plastic cap, this cap gets some water trapped inside it when washed in a dishwasher--maybe not quite as much with this one, but I can hear it sloshing around in there when I shake the cap.

This cap is all plastic (polypropylene, which has a fairly safe reputation at this time.)

Unlike the plastic loop-top cap, this one has a a texture around the edge where you grip it to tighten or loosen it.

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This is a good all purpose cap to go along with the Klean Kanteen bottles. We have one of the smaller sippy top bottles that we use for our 9 month old son when we take him out hiking but I use the flat cap to keep his bottle sealed while we''re travelling to the trail. Once we get there, I take this top off and put the sippy top on for him to use while we''re out for the day. The bottle is just tossed in with the rest of our hiking gear while we''re travelling and I''ve never had any problems with leaks at all.

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Durable, easy to wash cap. I use this cap when I don''t need my sports cap.