5. Vetiver: Earthy Depth and Aroma
An aromatic root known for its smoky, woody tone, vetiver introduces terroir-like complexity to drinks with rum, mezcal, or whisky. It’s an unusual cocktail ingredient that adds a perfumed depth few expect.

6. Glycerin: The Molecular Game-Changer
A colorless, slightly sweet liquid used in food science, glycerin stabilizes texture and prevents freezing. In mixology, it creates smooth, ice-cold drinks that stay velvety — a favorite among experimental bartenders.

