Glass shard identification help?

by Lauren S
(Los Angeles, CA)

Hello,

These pieces were found on a small island off the coast of Panama and I'm hoping to learn what they may be from.

I have 3 of these and I'm not sure if they once made up 1 bottle or came from 3 different bottles.

They appear to have a square shape and these are corners.

Piece one has the letters C and S.

Piece two has the letter C on it and piece three has an M (or perhaps a W?)

Thank you!!

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