Nothing like the pungent smell of onions when you open the fridge door! Nothing is ruined, but if you have odor absorbing foods uncovered like butter, cream cheese, cottage cheese, they will smell a little onion-y. The fastest way I know to get rid of the smell is prop the fridge door open a couple of inches for a few hours to allow the smell to escape. Put the old tried and true box of baking soda inside to help absorb odor. Place a bowl with a couple of sliced ripe red delicious apples inside. They will give off their fragrance and also absorb onion odor. If you do prop the door open, may want to move items in the door (milk, butter, eggs) to a shelf while door is open. For future storage I recommend to put halves and quarter onion pieces in a zip lock bag in the veggie drawer. For chopped onion and garlic, use a saved glass olive jar or pickle jar, jelly jar,any small glass jar with a screw on lid. You could use a small plastic storage bowl with snap on lid, but those absorb the odor and it won't come out. You could also store extra chopped in a zip lock in the freezer. Onion freezes well to be used later in cooked dishes, or salsa. You can add those little extra dabs to the bag until you have enough for a recipe.