Having owned a Foodsaver for many years, I am now on my 4th one. I have used it to save whole meals and be able to buy in bulk and freeze up portions for later use. As others have said.
I make my own bags from rolls and found it was great and economical way to save left overs and make 1 portion things like chicken breasts or buy hamburger in bulk and freeze in 1lb chunks as well many other meats.
One thing had always been hard to do was freeze liquids in these bags like chili or stew or soups. You had to unthaw a large amount and take out what you wanted.
Then I hit on a plan, why not freeze a 1 serving portion in a bowl that you were going to eat out of later. So I made them up in a bowl, froze them over night then popped them out and sealed it up.
Now you had a frozen bowl of what ever, that fit into the bowl that you are going to eat out of.
Just pop it on the microwave and there you go a perfect fit and just the right amount with no waste. Easy Peasy.
Works for camping, just take the amount of frozen bowls that you want of each thing.