I personally love our stainless steel Klean Kanteens. It is too bad that the sippy top is not ideal...it could be better, but it has worked for us. It would be good if it had a cap to prevent leaking. We now just use the adult sports lid that you can suck out of. My daugher has no problem with that, but she is at an age where she can open and close it. Stainless steel metal bottles don't keep scents or flavors.
I am guessing your Sigg has a wine scent because of that plastic liner in it. It must have absorbed it a little.
