Re: pumping and security inspections
Hate to say it, mama, but this sounds like an overreaction on your part. Expressed milk is nothing to be ashamed of, and I don't think your privacy is unduly compromised by submitting to a search in this instance. It's not like someone asked to see your breasts. Just what came out of them.
However, if you feel that things which are found during a search of your bags have the potential to contribute to a hostile workplace environment- if they become the subject of jokes, banter, or harassment- then there's a problem with your company's search policies. Things which are found during a routine search, which are not harmful, and which are of an intimate but not strictly private nature need to be treated as if they were invisible. I'm thinking of things like adult diapers, tampons, a box of condoms, a medical device, underwear, a Starfleet uniform and pair of Vulcan ears, etc. You can't have someone search your bag and then have it come back to bite you (e.g. "I saw those tampons in your bag and I know you're on the rag, haha!" or "Hey, I saw your spare colostomy bag and now I'm telling everyone all about it!"). So if something like that is happening, then I think THAT is what you address with your supervisors.
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"