We all have these workplace issues. Trivial perhaps - but annoying. You are entitled to feel wronged.
At my work, any creamers, salad dressings, and condiments are considered community property. If you have something that is just for you, put it in a lunchbox. I would never in a million years be offended that someone used my cream. I’d buy a larger container next time and say help yourself. It feels good to work in that sort of atmosphere, we all share, it’s never been a problem.
Musicmom, don’t worry - this is CC. If I start a thread about how great roses, puppies, and rainbows are, I bet someone will chime in how they hate allergy-causing flowers, someone will say that kittens are better than puppies, and someone will comment how they can’t stand the rain. 
I “liked” the weight loss portion of your post, not the asking to delete it. Keep the thread! Office food thieves are what they are - thieves. Moochers.
“You do realize I have a private habit of drinking cream right out of the carton when I’m feeling stressed, don’t you?”
I’m nominating the breast milk suggestion for post of the day. 
I bought a small frig for my office and a coworker asked to use it. I politely said no. The whole point was privacy.
No, do not delete. It truly is hysterical (Bunsen’s post #32.) And Mini-Moos??? What are these?
I think it is fine to complain when someone takes your stuff. Don’t feel you need to delete it. It isn’t like you went after her with a rifle - you just came over here and vented a bit. I would have noticed. I don’t know if I would have done anything -but I would have noticed and probably complained to my husband
When I moved to my new office, I got my own fridge. I allow no one to store stuff there . Well, I’m fine with office manager, but another woman is a hoarder, and she has taken over the other fridge, so she’s not allowed in my fridge. I’ve bought milk for commercial n fridge a few times. It is such a little expense, so I don’t have to feel bad if I take a teaspoon or 2.
I’ve had work environments where no fish products allowed, e.g. Tuna or salmon, because of the smell. People have their idiosyncrasies. No work lace is perfect.
I would state the truth. " I am on a diet and have specific portions for each day. Please do not interrupt my plan. If you take something of mine , it messes up my diet plan." Very specific and not aggressive, I think.
congrats on the weight loss @musicmom2015 .
You sound very nice.
I had a few good laughs on this thread too. Always nice to have a good laugh.
You can add a “hey” and “I am trying so hard to loose weight, so please…” Whatever makes it sound friendlier but to the point.
I’m a person who likes to share in theory, but then gets bummed out when there’s none left for me. If that’s you too, maybe you could try this: buy two cartons. On one, glue a index card with the note: “For the office to share! Enjoy! Please replace when empty if you like fresh cream!” On the other, glue an index card that says: “[your name]'s; for my diet plan. Please don’t use this but feel free to use the carton I’ve brought to share!” The other carton will be done soon and of course no one will replace it but you will get the message out and look generous in the process.
nottelling, I like your approach, and IMO it will work if the mooching is not intentional. However, “certified” office moochers usually don’t replace what they’ve used… but they will get used to the taste. And the next time they open the fridge they will reach for the reserved container because they will have this Pavlovian desire to cool their coffee with cream.
Now that I’ve vented and had time to think about it, I agree I really made a mountain out of a mole hill.
I have been so dedicated to this diet (no sugar since the first of the year!), and part of my success is a result of always being surrounded by food on my plan so I am not tempted to grab the most convenient thing. For instance, I always have lettuce washed and cut up, ready for a quick salad. I have to be diligent about taking stuff out of the freezer to thaw so I don’t revert to, “Oh darn, nothing is thawed so I guess I’ll order pizza!” It is a constant battle for me, and I shop with the intent for it to last a certain amount of time. If someone else is using my cream, then I have to shop more often. No biggie, but it just hit me the wrong way this morning.
By the way, I like this coworker very much. In fact, we have a very good staff right now.
post 53 and 54 had me laughing some more.
That totally make sense. Also your coffee with fresh cream is probably is treat you look forward to!
And BunsenBurner, yes, I see your point about the Pavlovian response! At least then, though, you wouldn’t feel guilty about calling the person out! That’s my problem – Feeling guilty about writing my name on food diminishes my enjoyment.
A little off topic…is whipping cream better tasting (richer?) than half and half??? (in coffee that is…)
I brought some pummelo to work but I left a few there and forgot that I left there. My coworker told me much later she took them and ate without even telling me. She went to my office looking to borrow my water heater and that’s how she saw them. I was ok with it. I give a lot of food away. So no big deal, in fact I laughed about it. But I’m not on any special diet except the see food diet. But f I have to go out of my way to buy something, I would get annoyed. It’s not the cost, it’s not about sharing or not sharing, it’s just that if I have a goal or plan to do something, I would hate to have it derailed for whatever reason.