The choice of container greatly affects olive oil preservation. Since light exposure can degrade olive oil quality, opting for a tin container that blocks out light is crucial.

When olive oil is exposed to direct light, which can happen if it’s in a clear glass or plastic container, it’ll cause the antioxidants to break down and the oil can become rancid.

A completely opaque tin container is ideal for blocking out the light; this is why olive oil bottles are often green since the darker glass prevents light from getting in.

Tin containers are also great at limiting the amount of oxygen — which also plays a role in degrading olive oil — coming in contact with the oil inside, unlike clear bottles.