Marvel is a United Kingdom brand of dried milk powder, now marketed by Premier Foods.
History, packaging and use
The product was launched in 1964 and is sold in foil-coated cardboard drums with the contents sealed under a tear off foil lid and in sachets.
To make milk from the powder it is necessary to put tablespoons of it into a jug or bowl, then add cold water and stir until the all the powder has dissolved.
References
Marvel (food) Wikipedia(Text) CC BY-SA