Wow! That's a good collection... I usually only find one type, the same every time! Lol... And I was going to say, from the first shot that they are named that as they look like fountain pen caps, then I saw the second... 😮 Ok, banish that thought! hehehe... I like those round top ones too - we don't see many of those here, and these look like someone chewed on some of them! Or do they naturally come with that chewed up look... hmmm....