By the end of the twentieth century, cuvettes were normally made of plastic, in a variety of colours.
Source: Shorter Oxford English Dictionary: 'Cuvette'.
Digital source of illustration (retrieved 27 June 2016).
GVE
Cuvette is a general term for a particular type of round sequin that has raised, faceted sides. The word comes from the French diminutive for cuve, meaning an ornamental, shallow dish for holding water. Cuvettes used for decorative needlework may be made of glass, metal, plastic, etc.
By the end of the twentieth century, cuvettes were normally made of plastic, in a variety of colours.
Source: Shorter Oxford English Dictionary: 'Cuvette'.
Digital source of illustration (retrieved 27 June 2016).
GVE