For the kiddos, or for a picnic, I just thought these were too fun and cheerful to pass by, and love how they stack inside this tin lidded old blue cardboard sleeve for easy travel. They are marked with a N on the bottoms, but I have not been able to figure out the maker. 1960s-70s I believe.
Cups measure 3 1/2" t x 2 3/4" in diameter. I think perhaps technically they are Melamine. Sleeve measures 11 1/2" x 3 1/16. Very good condition, with wear to the surface of the cardboard sleeve as pictured. There is one surface scratch to one side of the aqua cup, minor.