As long as the smaller tube does NOT come out of the bottom it will work on the vertical line. Not the best but acceptable if it is insulated correctly as it sounds it is.
The one in Tiggers pic is as he said " Wrong", in almost every respect.
If sense were so common everyone would have it !
All opinions expressed are my own. Any advice provided is based on personal experience, generally accepted fact or publicly available information. As such, it is worth exactly what you paid for it, not a penny more not a penny less !!