1.. There is the classic real of floss
and you break about 30 centimeters, 12 inches off, wrap most of the floss around a finger on one hand and a smaller amount of the floss around the finger on the other hand and then move the floss up and down and in and out. If the floss gets too dirty or frayed, you just roll more floss from the finger with the most unused floss, wind the used bit onto the other finger and then floss some more. This type of flossing is a bit clumsy and bit time consuming, but worked pretty well. The piece of floss is discarded after the teeth cleaning is over.
.. Then there are the more modern flossing teeth cleaning tools, called floss picks, which come in two varieties:
.. The throw away is just a dental floss pick that you throw out after one flossing of the teeth.
The other variety allows you to have a nice handle like that of a toothbrush and the floss pick head sits on the end of it. When the daily flossing is over, the floss pick head is discarded and a new floss pick head reinserted.