Even the best olive oil in the world will deteriorate over time or if exposed to light and air. At best the fruitiness in the oil will fade and it will smell and taste flat. At worst it will smell and taste rancid.

How to really taste EVOO:
The friendly way to enjoy EVOO is to dip crusty bread into it. If you are a serious taster, you should pour a small quantity of EVOO into a glass, hold it in your hand to warm it up, smell its aroma and take a sip while swishing it around your mouth before swallowing (swallowing allows the pepperiness to come through). You should cleanse your palate with a wedge of apple before trying more EVOO and refrain from drinking coffee or tea prior to tasting.

Why is ROSTO Australian Extra Virgin Olive Oil sold in dark bottles?
If olive oil is exposed to light it will deteriorate rapidly so it’s best to keep the oil in a dark bottle and only decant a little at a time into a small clear dispenser. If you add garlic or fresh herbs to a small amount of EVOO, store it in the refrigerator and use it fairly quickly.