• "Zero calories" or 0 grams of [blank] in the nutrition information. The regulations let them round down if it's less than 1 gram standard unit of measurement for that item (edited from grams).

A particularly egregious example is TicTacs, which are labeled as having 0 calories despite being almost pure sugar. The practice is also very common with alternative sweeteners, which have fewer calories than regular sugar but far from 0.