I keep a few margarine bowls, deli-packaged potato salad or slaw containers, sour cream, whipped topping (perfect for cereal), etc. No way to keep them all. The huge amount of plastic waste (including ziplock storage bags which I wash and reuse until they leak) put into the environment is distressing.
Some Tupperware pieces I've had over the years deteriorated ... sticky, lids cracked. Stickiness can usually be successfully cleaned but not cracked items.