I think Tigging wire is tough. You have a material with considerable thickness, but little ability to absorb the heat. I found it dificult, my best method, as a hack with no previous experience with the stuff was to make a series of mini tacks. I should say I was using one eight in. SS wire, actually a lot of my problem was that the only rod I had was a little too thick, had I had a source for the thinner stuff I probably would have been fine. Still, I would do it with Harris 45% Safety silv.

The bends for that look easy enough, but I would advise you to get something cheap to pre-run them with. Normally bends are super easy to do, the second time around, and that can be the third time around when you get to linked bends that you have to do a L and R side from the center out. But its just a few seconds work with coat hangers.

Do you have a picture of the thing on a bike with a bottle in it.