Chrome Camping Thermocups Set of 6

This is an interesting "camping tool". There are 6 chrome 4" high chrome tumblers that sit in a collar with screw-on lid. They are arked o bottoms Thermocups made by American Thermos Co, Patented March 26, 1912 New York. There are three handsets to apply if you want a handle for the cups.The tumblers have a brass color inside. All in good condition and signed. 

$75.00 OBO