Manual breast pump recommendations?

Am

Hi ladies! I need to get a manual breast pump for when I’m on the go and can’t hook up my electric one. I’m not going to need to use it very often, so I’d rather not spend a ton of money. I already have a haakaa, but it doesn’t empty my breasts enough to use just that while I’m away from my baby. I use a 20mm flange on my electric pump, I’m assuming I need one that has the same size available.

Any recommendations or ones to stay away from?