I can't tell how big it is......
Sometimes it looks small enough to be a bottletop opener, gripping from the opposite side of the bottle and a downward motion
Sometimes it looks large enough to be a fireman's tool, like for prying open a car door or something
You don't look through it and you don't put trash in it even very little trash
This one happens to be made from a type of plastic, which is the most common.