If you use anything in the line up of Playtex Sippy Cups and need to replace missing straws/worn valves etc, they will send them free if you call customer service.
Rubes loves and will only use the straw cups. As a result she wears through the straws and valves. I didn't want to buy a whole new cup so I called to see what I could do. The lady said she'd send me some new valve straws no problem.
Super nice. Just thought I'd share as it's much cheaper than a whole new cup.
This may be old news but I thought it was pretty cool.
Re: XP: Sippy Cup replacement parts.