There are still some fundamental flaws with the design. The spigots needs to go through the handle so there needs to be support sown into the handle (plastic strip) or this thing is just going to pull apart very quickly. if you were going to market these with a chain they would be putting samples you put in front of them through the ringer. Barry you also need to think about the material supply cost as well, Like jazz has said the first outlay could be expensive.

Look at what others do, generally they rivet or sow the handles to the bag then put a decorative cover over the top (these could be similar to what you want in looks). These covers are normally pressed parts (looks cheap), i don't know what your retail cost of this bag is but the cost can spiral quite high if you do not understand a bit more with the manufacture costs (this is not a dig just an enlightenment call).

It would be interesting to see what your alternatives are?