Jiggle syphon

I would say that they are all much the same. I bought one cheap off ebay a couple of years back & now would prefer to buy one I could hold in my hands first. The ebay cheapie was old stock & had developed a kink in it's original packaging. In use the kink was a permanent problem, to the extent that it really wasn't very useful at all.

I still have & carry my half inch one that I've had for well over a decade but my 'go to' if fuel transfer is needed these days is a rechargeable lithium battery powered (recharges via a USB C cable) transfer pump, which certainly costs significantly more than a jiggle hose, but suits my purpose better, making fuel transfer on our setup *much* easier. Empties a 20 litre jerry into our fuel tank, whilst sitting on the ground in less than 2 minutes. I believe one battery charge is good for up to 300 litres! I very recently had need to use the pump for the first time since we left home almost 18 months ago, it hadn't been charged since then but it just switched on & did the job without issue.

Rechargeable fuel transfer pump