In Cuba (Guantanamo Bay), the brothers would try to save the stalk of any apple or pear they were given. They would then hide it and wait for it to dry out so that they could then use it as Miswaak.
When the US soldiers found out they would search them - and their 'cages' for it - a fruit stalk of all things. But then it was a small luxury for the brothers. And they weren't supposed to have basic needs and necessities - never mind luxuries.