P.C.
I guess First years is good for skipping amjojr spill, it will still leak (good at dinner time or so). On the go I use Gerber cups. They have small valves but easy to wash and just one piece. My daughter used them for over a year now and I had to exchange the valves in probably 3-4 of them. You can get valves separatly in Albertson. I love Gerber, no leaking there