Light, heat and air are the enemies
Keep bottles in a cool cupboard, away from the stove and sunny windows. Close the cap tightly after each use.
Use dry utensils
Water droplets can spoil oil. Always use a dry spoon, and never pour used oil back into the bottle.
Sediment and solidifying are normal
Natural sediment settles at the bottom of unfiltered oil. Coconut oil turns solid in cool weather. Stand the bottle in warm water for a few minutes to melt it.
Buy the right size
If you cook with a particular oil only occasionally, the 500 ml bottle helps you finish it while it's at its freshest.
