I exchanged emails with a couple reps from Tommee Tippee regarding replacement valves for the sportee cups. Unfortunately they do not have just the valves or even just the lids to replace them. They were kind enough to send out an entire replacement cup. The majority of the emails were responded to promptly. Overall, im very satisfied with the outcome.

However, I would love to buy a bulk of the valves for the sportee cups. Tommee tippee should really consider selling them.