I’d not seen anyone else doing this so thought it was worth sharing.
I’ve always found the jug/bottle sling knot useful, but thought having to have both sides of the loop perfectly even slightly annoying.
So this is a version with couple of Matthew Walker knots used to make a soft shackle to form the handle rather than the loops on their own, and it has the added benefit of letting you attach it around whatever you want after it’s tied.