Page 293 - Buck Tilton - Outward Bound Ropes, Knots, and Hitches 2 ed.

Tuck the working end through what is left of the
loop and tighten by pulling on the standing part

until the loop disappears beneath the binding.

Asher’s Bottle Sling

USED FOR HANGING A BOTTLE OR OTHER SIMILAR

CONTAINER OF LIQUID

Onboard a ship, bottles of liquid—bottles of water, stove
fuel, alcoholic beverages—can slip, slide, fall, spill, or break

open. This is one of several sling knots that grip the necks of
containers, glass bottle or otherwise, allowing the container

to be hung safely aside or carried with greater ease. Asher’s
bottle sling is credited to Dr. Harry Asher and first appeared

in print in A New System of Knotting, Volume 2, published in
1989.