Is pinning necessary?

[cyborgparanoia]

Or can I keep dead specimens in small tupperware containers?

I didn't want to kill any insects so I opted for photography, however, I have found bugs already dead and wanted to keep them.

They are ofcourse too stiff to pose or spread so can I just put them in a plastic containers?

I have a painted lady butterfly I found a while back in one of these.

And someone I know just gave me a dead cicada. I also have an old wasp nest but obviously I don't have to pin that.

Now that I have these 3 objects I'm kind of inspired to keep an entomology collection.

So why is it that I have found zero information on the internet about how to preserve insects besides pinning and alcohol?

[nomad]

If you want to keep specimens such as butterflies, pinning is absolutely necessary. There are lots of web sites such as this link lancaster.unl.edu/4h/fair/countyfairresources12/CollectingInsects.pdf