It's ironic that manufacturers looking to reduce the amount of material in food packaging over the years, so that less material ends up in the landfill, makes such packaging less reusable by consumers. Plastics are thin and difficult to wash (distort in the dishwasher, collapse when hand-washing). Shapes aren't designed to be easy to wash, but for their visual appeal and streamlining manufacturing.
And focusing on reuse now days means choosing products that come in packaging that lends itself to reuse. I really wish they still made those jelly glass tumblers. I found one producer that does, but those products aren't in stores around here, and shipping on 4 jars of preserves is 50% of the cost of the preserves themselves, and it seems like the carbon cost of shipping would outweigh my attempts at practical reuse.
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