For years I too had been using cling wrap, a single-use plastic film that isn't recyclable or biodegradable. A product that gets its stretchy/stickiness from all the chemicals and resins they add to it, which all end up touching our food...eeek. Then I moved over to biodegradable cling wrap, but it was still only single use before being discarded...then we discovered these babies.
Stretch 'em over your bowls, your dishes, mugs or jugs and they'll seal (water)tight without adding to our global plastic problem. Or use them in the oven instead of baking paper. Do it with me now - s-t-r-e-t-c-h!!!!