That for me is a trial and error issue.
odviously thiers thier no such thing as perfection, sooner or later you will just have to settle for the one that does the least damage , I myself have never had a problem with those things, course my kids learned real quick to use the cup without it.
But when you get the chance, try Gerber. if thats the ones that is messing up , then I have no clue, my kids are 14 and 15 now so it's been a while. but i do babysit from time to time and thats the one that did good for me.
If this is the least of your problems MaMa you are truly blessed, and please if it does work then please let me know, like I said it's been a while and i don't know if that product is still that good.
Good luck MaMa, enjoy your time with your children, before you know it they will start asking for the keys to your car.
Sincerily,
Jan