Rubbermaid Brilliance 1.3 Cup Stain-Proof Food Storage Container, Set of 2

these are a little bit expensive but they're absolutely worth the money. the seal stays good, they're dishwasher safe, and they truly do not stain. they're also extremely durable. I like them more than any of my other storage containers and if you forget about something in them they don't get funky

At first, I was very disappointed when I received them as I had expected them to be larger for storage. I had some dental work done so for the time being I am unable to eat Peppers, Onions and anything hard (I had cut peppers %26 onions for my salad.). So the Peppers that I had for my salad got cut up as did my onions and each put in a container then to the freezer. They are a perfect size when you dice up your vegetables, carrots, celery etc., whether putting them in refrigerator for later or freezing. They are clear with a beautiful line and a seal that will not let anything in or out. Store watermelon chunks and the juice or syrups will not leak out no matter how you position them and everything stays fresh.