M.C.
At 10 months, I would try t get her something that is more free flowing. (Doesn't restrict the liquid) she is old enough to learn how to control the flow herself. Heck, you could even try her on a regular open cup if you don't mind cleaning up a few small messes until she gets the hang of it. (Just put a couple swallows of water in at a time, guide her drinking the first few times, then let her have at it herself. By the time my DD was a year old, she only used straw cups for the car or when we were out and about.)
If you aren't interested in going that route, I can't remember the brand, but we used strW cups from Walmart. I know they came in a 2-pack, the cups were contoured, the lid colors didn't match the cup colors, and the straws actually had a removable control valve. (Put it in, only half the amount of water could get through, and no spilling. Take it out, and the straw was open to full flow, but would dribble a bit if tipped over. They were pretty good. :)