How to store cooking oil
The best container to store cooking oil for a longer duration is dark-coloured glass bottles especially blue and green ones with tight-fitting caps.
If you bought a large bottle or tin of oil from the market then for daily use transfer a small amount of the oil into a small dark-coloured glass bottle and use it in the kitchen.
You can also store some delicate cooking oil in the freezer which are sunflower oil and sesame oil.
When stored in the fridge these oils might become cloudy so to reuse, you will need to take out the oil one hour before using it, and let it sit at room temperature, allowing the oil to return to its usual texture.
You can also store these kitchen oils in good quality containers and keep them in a cool and dry place.
Because warm temperatures and sunlight can break the oils down and make them go rancid faster.
To check whether cooking oil is good or bad just smell of oil, If you sniff of sour or rotten smell coming from your oil which is different from its usual smell, then your oil might be going bad.
Otherwise, if you see that the colour of the oil changes or moulds are growing in it, then the oil has gone bad. Sometimes when oil becomes rancid it starts getting thicker.