The art of scientific glass blowing (2018)

Gayle takes another 1.5-metre length of hollow glass rod. Slowly spinning a now shorter length of glass between forefinger and thumb, she inserts one end into the burner’s 1,220°C heat. Instinct tells Gayle when to pull the glass out of the flame and press that orange, open tip to her lips.

Source: wellcomecollection.org