A mid 20th century green crystal glass champagne or wine bucket in the form of a top hat by Dartington of Torrington in Devon. Marked on the base: Dartington.
 
English, circa 1960
 
Dimensions

Height: 13.5cm / 5¼"
Diameter (of top): 22.5cm / 9”
Diameter (of base): 12cm / 4¾"