Go to a pet store and look at the mirrors that are meant to be hung in the cages of pet birds such as parrots and cockatoos. These mirrors which come in various sizes are extremely tough and are much better then any of the "survival" mirrors that you can buy.
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Earth and sky, woods and fields, lakes and rivers, the mountain and the sea, are excellent schoolmasters, and teach some of us more than we can ever learn from books.

John Lubbock