Bulgarian Officer's WW1 Aluminum Field Cup

Rare WW1 Bulgarian officer's aluminum field cup. Army issue cup, part of the officer's kit. The handle is made of tin. The cup is marked with number 7, four stars and an emblem in which can be seen combined the letters A and T. Please see the period photo, it shows WW1 Bulgarian officers at the frontline with such cups.  

Height 3", diameter 3".