In article , david@abacus-
nurseries.co.uk says...

Don't throw it out; use it in the garden

Comment.. she must be in a timewarp, she's only half a century late
with those suggestions.

Btw I would not recommend polystyrene packing peanuts for mixing
in potting compost; sooner or later when you want to recycle that
compost on to the garden, it will still be full of unsightly blobs and
you don't want pets wildlife or birds to swallow that stuff.

Janet