Sodas and soft drinks - Most sodas, especially sugar-free varieties, contain small quantities of alcohol, up to 0.5% ABV in some cases.
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Bread - Some breads are known to have elevated percentages of ABV, burger rolls, for example, and rye bread.
Fruit and fruit juices - Certain fruits and fruit juices contain higher than average trace elements of alcohol, specifically orange, apple, and grape, all of which contain between 0.04-0.5% ABV.
Kombucha and must - Kombucha tea is often labeled as "non-alcoholic," but in fact can contain anywhere between 0.5-5% ABV.
Vinegars - Balsamic vinegar and gourmet vinegars, namely champagne, sherry, and red and white wine vinegars, contain anywhere between 0.1-0.4% ABV.
Sauces - Vinegar is one of several condiments that contain alcohol. Another is soy sauce. Mustard, too, has an alcohol content.
Food additives - Food additives like extracts or flavorings contain varying amounts of alcohol, often in high concentration.
Cakes and pies - Vanilla extract is found in a bewildering array of desserts, things like cakes and pies. It's therefore no surprise that these sweet treats also contain alcohol.
Fermented vegetables - Fermented vegetables, things like sauerkraut and kimchi (a traditional Korean side dish) contain small amounts of alcohol.
Ripe bananas - Bananas, and especially very ripe bananas, have an alcohol content of 0.2-0.4% alcohol by volume, or ABV.