Gas cookers were once the main form of cooking element in villages. Although Crete is not connected to gas via pipes, it is still standard practice to use a gas cooker (for reasons of economy) connected to a gas bottle. Once the bottle empties (you will notice the flame not burning brightly, or the bottle is simply empty and gas won't light up), you take it to your nearest gas station (it could be a petrol station) to fill it up, or phone someone to come and replace it for you (if you're not very mobile).
The gas bottle sits in a corner of our balcony. It's connected to the kitchen via a small hole in the wall.
These mobile gas elements are still used by a lot of people such as economic migrants, people on very low wages, owners of country houses in remote villages and others who can't afford the money or the space for a whole cooker. This shop must be doing good business in these difficult times when gas is cheaper as a fuel and the cost of living is rising.
Notice the electric elements next to the gas elements, all of which are fitted into the kitchen unit
We use gas for most of our cooking needs, but, as part of the trend in modern house construction and design, the elements are fixed in the kitchen wall unit, rather than being a separate item, as these gas cookers are. I love my gas cooker; chips always fry better on a gas cooker than an electric cooker. The big bonus is that when we have a power cut, I can still cook or warm something up.