I'm open to hearing about easier methods, but I tried unsuccessfully to tie the jug sling using the diagram you posted. Do you actually use that method? Perhaps that method is why you prefer Asher's jug sling, as you indicated above.
Using the method I posted above in the video and the diagram, I can tie the jug sling in about 7 seconds.
I do use that method. I can perform it in 20 seconds. I suspect the difference between us is not due to the difference in methods. :-) This knot is complicated enough that how you hold your fingers as you make the knot is very important in managing the evolving complexity of the knot. I think I'll make a video to show how I do it. I put some effort into developing hand motions that keep the knot from confusing me in the final stages.
I have two issues with the jug sling for my most frequent uses: 1) Even when well practiced it is complicated compared to the Asher bottle sling, so takes more concentration, but the result is no better for my applications. 2) If you use a preformed closed loop, it's tricky to get the two handles even. If you want really short handles with a preformed closed loop it's even tricker. With the Asher bottle knot, if you want a short handle for a standard bottle, to clip onto a carabiner, for example, you just use a preformed closed loop designed for the diameter of the bottle, and there is no fiddling.
If I'm hanging a bottle of something that's worth $20 or more, I'd rather not use any kind of slipped knot. The Jug Sling holds and untying is not easy, which is what I want.
I use the buntline hitch to suspend the bottle from a D ring without using a biner. The buntline hitch is not part of the gripping of the bottle. Either sling can be used with a preformed closed loop that can be hooked onto something or clipped onto a biner.
Is your main dislike of the Jug Sling that you can't tie it quickly?
See above.
I just realized something. I'm using a slipped buntline made with the two free ends of the Asher sling in order to keep the slack between the D ring and the bottle to a minimum. Clipping conventionally into the D ring with a biner made the assembly too dangly.
But if I use a short custom closed rope (the other meaning of _sling_) to make an Asher, I can poke the very short handle of the Asher through the D ring and use the biner only to keep it from slipping back out. That way I can keep the slack as short as I can make the handle of the Asher.