Favorite manual pump?

My SO is standing up in a wedding in October. I’m exclusively breastfeeding but we’re not bringing our baby to the wedding so I’ll need to pump several times throughout the day. I don’t want to haul my double electric pump down with me, especially since I don’t know if there’s anywhere at the venue that would be secluded and comfortable to pump so I’m thinking of getting a manual pump I can throw in my purse and just pop off to the rest room a few times to pump.

Do any of you have one you really like? I have a haakaa, but I don’t think that would be sufficient for this.