It probably wouldn't last as long with another biscuit as it would go soft too quickly. So you'd have to eat it rather quickly. Also other biscuits aren't as sturdy, so that may also be an issue.
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I use a cardboard Santa box with a ribbon for our CEB. It only cost about £6 and is the perfect size for the few bits I put in it.
I've not used Aliexpress. I've heard it can be hit and miss, but they refund quickly if you're not happy anyway. Worth the risk I think.