Georgian Opaque Twist Ale Glass c1760

Description

Heading : A tall 18th century ale or champagne glass with opaque twist stem
Period : George II- George III c.1760
Origin : England 
Colour : Clear 
Bowl : Pointes funnel
Stem : Opaque twist. Two pairs of spiral threads outside a corkscrew gauze
Foot : Conical
Pontil : Snapped
Glass Type : Lead 
Size :  18.5cm height.  5.3cm diameter bowl. 7.2cm diameter foot 
Condition : Excellent. no chips or cracks 
Restoration : None 
Weight:  163grams 

With this not being engraved then dare we say that this is dual purpose?