Danish Go-Rounds - 1971
I think this is a rather unusual piece, as I've not seen much from this brand. It's a foil-lined envelope from Kellogg's Danish Go-Rounds -- a strawberry filled toaster treat.
Kellogg's changed the name to Danish Rings around 1977, and I think they were basically the same product still.
They should have had a little cartoon viking mascot, in my opinion.