I bought these cases with the purpose for displaying my cup collection but they also work great for storage too. They come flat so you just have to open them up, take the protective plastic off, and fold them together. For being just $1 each I’d say they’re pretty sturdy. I haven’t had an issue with them coming apart once assembled. They’re the perfect size for the shaker cups and the jugs. I would recommend these to anyone looking for an affordable display and/or storage option.
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if you want something to keep the dust off and provide some basic protection this is great.