Perfect addition to the Haakaa pump - don't buy a Haakaa without getting the stopper or you will be back online and ordering one! Easy to use and do the job while also looking super cute.
I ended up getting two of these little guys. They're made of thick silicone and don't need a lot of force to be pushed in to stop any spills.
"This product is amazing. Good quality, thick silicone for extra suction. Nice sturdy base. It is a non hassle way to express milk, that would other wise have been wasted. I tell every mum to be to get one."