Dates should be refrigerated, unlike other dried fruit. Dates are less dehydrated than cranberries or apricots.
Dijon or wholegrain mustard can be stored after opening due to its preservatives. Refrigerating open mustard jars considerably improves quality. Cooler temperatures retain its color and punch.
Jam's high sugar content makes it shelf-stable. Refrigerate it. Avoids mold, discoloration, and flavor loss. Never double-dip spoons or dip food directly into jam to avoid bacterial contamination.
US eggshells degrade after sterilization. Keep them cool to avoid germs. The EU advises against refrigerating eggs and against disinfecting them.
Opened red wine should be refrigerated, contrary to wine lore. Once opened, wine changes color, flavor, and texture and turns into vinegar.
Many oils benefit from refrigeration. At room temperature, sesame oil and other unrefined nut oils can develop rancid and lose flavor.
Infused oils improve salads, marinades, and meals. Possible botulism. Oiled herbs, fruit, and vegetables may contain Clostridium botulinum spores. Fresh food water breeds bacteria. Refrigerated infused oils last a week.
Whether to store ketchup in the fridge or cupboard is a debate. Ketchup's high vinegar, salt, and sugar concentration makes some think it's safe to store at room temperature.
After opening, refrigerate bottled lime and lemon juice. Unrefrigerated food might grow sour or tasteless. Lime juice will discolor if not chilled and sealed.
Refrigerate apples. Apple ethylene ripens other produce faster. Ethylene production slows, extending fridge life. Wet a paper towel or plastic bag with holes and cover apples.