Fits Classic narrow mouth bottles only.
(with internal threads)
Choose options
The 100% leakproof Flip Seal Sport Cap comes with an ergonomic spout that opens and closes with just a flick of the thumb and can be used with or without the included stainless steel straw for maximum versatility so you can stay hydrated your way. Includes special telescoping straw to fit various size bottles. NOTE: Compatible with Classic narrow mouth bottles only (with internal threads). Recommended for kids ages 3+.
| Weight | 3.4 ounces (96 g) |
| Size | 5.3" H x 3.5" W (134.6 mm H x 88 mm W) |
| Leakproof | Yes |
| Note | Not for use with hot beverages |
Child Safety Warning: Cap not intended for children 3 and under. Not intended for chewing or teething. Always use this product with adult supervision. Some adult assembly may be required.
Check out our Care and Use page for videos, maintenance and cleaning tips.
Questions about materials or sustainability? Visit our FAQ page.
Overall rating: 4.253165 / 5 from 79 reviews.
The Classic Flip Seal Sport Cap is highly regarded for its leakproof design and ergonomic spout, offering convenience and versatility for hydration on the go. Customers appreciate the quality and functionality of the cap, though some noted difficulty in use. The telescoping straw fits various bottle sizes, making it suitable for kids ages 3 and up.
Review topics: [size, quality, design, fits, upgrade, water, improvement, works, use, straw, cap, bottle, lid, kids, klean kanteen, seal, leaks, spills, caps, diameter].
"I love that I can use this cap on other bottles that don't have the metal straw but the adjustable straw sometimes slips out of the desired length and therefore needs re-adjustment. It would be ideal if there's a locking mechanism built in to the chosen spot/length. It would also be nice if there is a choice of color aside from black so that it would better compliment the other colored bottles."
"I love KK products, but have had to replace many kid sports caps over the years due to the small plastic/silicone valve falling out. This new lid is a huge upgrade"
"I really enjoy these caps. The straw with flip spout makes trail water breaks quick and easy! No fooling with the cap. No cranking your neck. No spills. Got 4 for all of my bottles. I learned not to put the bottles in my pack. Gear can press on the flip knob. That allows water to leak out of the vent hole."
"I love it. Easy to drink from and fill. We have have 5 bottles with flip seal sport cap. The narrow diameter is perfect for the car."
"I like it and the cap doesn’t leak, I wish the straw had the lip like the kids straws that keeps it in place. It sometimes separates from the top when I’m filling my water bottle then I have to fish out the straw from the bottle. I’m a nurse and even though I wash and wash my hands I’d rather not stick my finger in my water bottle if I can help it! It also sometimes has such a strong seal that it creates a vacuum and I can’t drink water until I loosen the cap some."
"So glad they make these! Great fit and quality."
"My favorite of all the tops from kleen Kateen"
"I had to replace all my son’s flip caps because the old ones ripped because the straws were not fitting. This is much better and I love the telescope straw. Sometimes the straw falls out of the cap, but at least they don’t tear the rubber."
"Functional and easy to clean ! Keeps your water clean too by being able to securely close the lid. Excellent quality."
"The new lid is great. Easy to use and I love the that the straw is metal and not plastic."
