Just as described!
"Just as described!"

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Overall rating: 4.206897 / 5 from 29 reviews.
These Sport Cap Dust Covers are designed to keep dust and debris out of Classic and Kid's bottles. They snap over the Sport Cap spout and contain any drips, ensuring cleanliness. While some users praise their functionality, others have mixed feedback on dust containment.
Review topics: ["fits","works","cap","caps","stays","leaks"].
"Just as described!"
"The cover seems a tad big for the sports cap spout. Perhaps the spout of my sports cap has shrunk in size over time. Sometimes the cover stays on but at times it slips off by itself. Needed to rig it with electrical tape inside the cover to help it stay on. Oh well."
"Great Straw Top!"
"We like to keep the mouth & cap of our bottles covered while out & about. These caps stay on poorly, but help a little. I would not purchase them again since I could simply repurpose something to do what these do (regularly pop off for no reason). I thought that buying from Klean Kanteen, meant they might actually work."
"Very well designed"
"The dust caps work perfect, I hated the sport cap initially because of all the crud that stuck to the spout so I made some red neck caps that never stayed on. Once I realized Kleen kanteen made them already I ordered 2 sets. Now it’s our go to bottle."
"One of these covers should really be included with every sport cap, since the mouthpiece is otherwise exposed to all sorts of contamination. I don't like that I had to pay extra for these, but they fit perfectly and stay on securely."
"These are a helpful solution to the sports caps, which are leaky. They also help keep germs off of the spout. In my experience, they tend to break after a few months so need to be replaced pretty often."
"I ordered these as back ups for my kids water bottles. The caps work great at keeping dirt out when they are at outdoor school."
"First time using it, my child dropped her cup and the cap broke off. Took awhile to receive product. Not sure if I would recommend as the quality doesn’t seem to be lasting. I originally bought the cover from their website because there wasn’t anything on Amazon, and the sport cap on the bottle has come open before spilling in her backpack. Sigh. A new design would be nice."