Two victorian firing tumblers of flint glass

This small tumblers are, here call vasos de pulpería to ingest caña a popular distillated drink from sugar cane, known as firing glasses. They have a very pale purple tinge under sun or fluorescent light (second and third picture), they glows a little in yellow under black light (last picture) and glows white under germicide lamp. I am very confused about it but I speculate that it is because they have manganese as decolorant. They are heavy, bell shape of thick glass with rough pontil, they are 6 cm high. Dorita give it to me as a present because we bought several small things two days ago, as a YAPA, without translation. Most probably, they were produced in England before 1880. In the first picture you can compare the bright green fluorescence of the Vaseline goblet (England 1850) and the Bohemian glass with bright manganese amber foot (1920).