I had one of those, and the one-way valve fell out the first time I used it. Since then, I just use about 5-6’ of tubing, fill it with star-san by dipping it in the bucket, drain about 12” from one end, and put that end into the jug to transfer (keeps the star-San from dumping into the beer). Either pinch the other end, dump the star-san into a cup, and as soon as the beer starts flowing put the hose into another jug to transfer. Sounds more complicated than it is, not too difficult.
To bottle, the bottling wand goes into the other end, and then fill directly into bottles.