Keep White Mushrooms†in its original packaging. If to be kept for a while, keep them†in a paper bag, or in a damp cloth bag in the refrigerator to allow ventilation and preserve its texture. Avoid†storing mushrooms†in a plastic bag, which causes them to deteriorate quickly.
Store Red Onions in a dark, cool, dry location in the kitchen. Avoid placing them in a plastic or covered container as it needs to breathe. After days of storage, always check for any spoiled, moldy bulbs and discard at once to avoid affecting the others. Any sprouting bulbs must be used immediately. You can also store it in the fridge but take care not to place it beside other food and produce which can absorb the onion's odor.