Classic Flip Seal Sport Cap

Great upgrade

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

Great. I have three 27oz. Bottles with classic flip seal sport cap, a 16oz and a 12 oz.

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.

Adjustable metal straw-Classic Flip Seal Sport Cap

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.