Tokyo ghoul - chewing gum for ghouls (gum base is latex so it shouldn't be repulsive like human food, other ingredients in normal gum are just sugar and flavouring which can be replaced with human-based substitutes) helps them blend in cause who would think a ghoul would chew gum, and helps them curb their appetite à la Keneki's sugar cubes - could also make a sugar free coffee flavour (either with or without human components)