You will find that when you purchase your provisions from the various stores you encounter on your Ionian travels, that the locals love to give you plenty of plastic bags.  As in most countries, getting rid of these plastic bags is an environmental hurdle. 

For this reason, we put two re-usable shopping bags on each boat for you to use during your holiday.  Please do use them!  You are free to take them home with you at the end of the holiday if you wish.  They are really very handy, as they have an "integrated bottle holder" inside!