First of all, I like this bottle.
Looking through the album on Yahoo I noticed a jug I have seen before and liked then and still like, you call it Jug 1 and it is the second photo in the same album.
In this one you also used leather, to make a handle but it also shows at the side of the jug.
In the small jug, photo 7, the leather of the handle is also decorative on the body of the jug, also a good 'mix'.
I often mix several kinds of string, sometimes for colour, sometimes for structure and as long as the functionality is not in danger, I would say, mix whatever you like.
Willeke