GerberNUK 2 Pack Replacement valves Spill Proof Cup, Colors May Vary

These little suckers tend to mold in the seal so I have to throw them out because it's hard to clean and I tend to break the seal in attempt to clean it so I got to buy extras

Never drips and a great fit for replacement.

Work amazing

I’ve ordered this pack of replacement valves at least 5+ times. We exclusively used the rim style Nuk cups for my daughter to transition off of bottles. We did not do regular sippy cups. They often come in a plastic bag - still from the manufacturer, not 2nd hand, but it doesn’t look like the picture necessarily. They fit well & I never had any issue with them cracking the cup lid. They CAN be tight to go in, but so do the ones that come in the cup when you purchase it.The valves are difficult to really clean and get down in to, even with smaller specialty brushes. These replacements were perfect for two reasons - 1) After so long of putting a brush through the valve opening or pushing to get in the little creases, over time they wear out and you can see cracks in the rubber. 2) When my toddler Houdini’s a milk cup for a few days, the cup is easy to clean but the valve seems hopeless. We kept 2-4 extras on hand. I would buy these again and plan to with my next baby.

I love that there are replacements for these cups, they're gray cups and they never leak! When they start to leak it means the stopper is broken and this is the place to buy another one! I definitely will be purchasing more in the future. They used to be cops were actually my sons when he was little about 6 years ago. And now my daughter's too and she uses the same cups I just bought new stoppers for them.

I love this I no longer have to worry about my bed or couch being soaked due to a leaky cup. It is very durable, very easy to use

Great fit for bottles when you are a parent small things just go missing.

Worked perfect for my kids nuk cups