"Alcohol Flasks – Travel Accessory."
Set of 2 flasks in silver plated metal and glass. The stoppers open by rotating a quarter turn, a cork pad inside ensures the seal (one of the two is dry and brittle). The glass part of each bottle has cut sides. The metal base is fixed. A very small chip is visible on the right side of the small model, some traces of use also on the two flasks. No marks so no attribution but perhaps an English work from the beginning of the 20th century. Other models in silver or silver plated metal are available, to be seen on the last photos. 
Le Magazine de PROANTIC
TRÉSORS Magazine
Rivista Artiquariato