1) Breath sweetener 2) Lozenge 3) Scented lozenge 
• (n.) A silvered aromatic pill, used to correct the odor of the breath.
Ca`chou' noun [ French See Cashoo .] A silvered aromatic pill, used to correct the odor of the breath. 
A cachou was a sweetmeat in the form of a pill, made from the extract of liquorice, cashew-nut, gum, etc, and formerly used by smokers to sweeten the breath, particularly during the Victorian era.
[n] - a scented lozenge used to sweeten the breath (e.g. to conceal the odor of tobacco)
noun a scented lozenge used to sweeten the breath (e.g. to conceal the odor of tobacco)