Antique Sterling flask or store mixer

Product Name: Antique Sterling flask or store mixer
Really not sure what to call this. Appears to be a type of flask with 2 detachable cups. In really good condition, minor dents but you can't see them with the cups on. Stamped Sterling 24 on the bottom of each cup. Measures 6.5 inches high, 2 inches wide, 5 inches around. The hinge that attaches the cap to the flask is broken but the cap still screws on tight. I haven't tried to put liquid in this to see if it leaks. It's more of an ornamental piece. Perfect gift for a mixologist. Smoke and pet free home. Open to reasonable offers. If anyone can tell me what this or has any info, I would greatly appreciate it. vintage flask, silver flask, antique store flask, bar decor, mixologist.