My wifes grandfather was a missionary in Kenya from 1938 till after world war 2. He carried a collapsible cup made of silver plated brass. On the cover it had a magnifying glass and on the base/cup side it had a compass. It still works perfect today. When it was folded it had a storage space as all collapsible cups do. Has anyone seen a similar item? I would love to have something like this. <br><br>Perhaps I could modify one of the cheap plasic ones.