Spirits, liqueurs, fortified wines.

Uppercase brand names, lowercase generic styles:

amaretto

amontillado

Angostura bitters

anisette

armagnac

armagnac

Bacardi

bourbon

calvados

cassis

cognac

cognac

Fernet-Branca

Frangelico

grappa

grenadine

maraschino

mirin

ouzo

pastis

sambuca

Tia Maria

Cocktails

Lowercase names of mixed drinks, apart from the odd proper noun which has not become standardised as lowercase:

black russian/white russian

brandy alexander

daiquiri

harvey wallbanger

Long Island iced tea

mai tai

manhattan

margarita

martini

Moscow mule

old-fashioned

pina colada

rusty nail

sangria

Singapore sling

Tom Collins