This is a very secure way to carry and hold your bottle and has the added benefit of looking good.
Step 1: Step one of snake knot
Use about five feet of each of the two colors you choose. arrange them as shown
Step 2: Step two of snake knot
Take right farthest cord and bring it under all others to the left...in this case the bright green. And then lay it over on top of all of them toward the right.
Step 3: Step three of snake knot
Now take the farthest cord on left(black in this case) and bring it over and through the loop as shown. Notice how it goes around and under all including itself and finally on top of the farthest green one.
Step 4: Step Four of Snake
Pull knot tight
Step 5: Step Five of Snake
Loosen knot as shown and bring the green around and under and through knot again.
Step 6: Step Six of Snake
tighten knot back down and notice last working end should be on bottom as arrow is pointing.
Step 7: Step seven of snake
Turn over whole knot work as shown in pic.
Step 8: Step eight on snake
Loosen knot again as shown
Step 9: Step nine on snake
Bring the black under and around and through knot like you did the green earlier
Step 10: Step 10 on snake
Pull knot tight again
Step 11: Step 11 on snake
Flip project over and loosen knot again
Step 12: Step 12 on snake
Bring green around, under and through knot and tighten again
Step 13: Step 13 on snake
Continue doing this weave until you have an inch or so of the length you desire. Notice the arrows pointing to the two outside strands that we will cut off next close to the snake weave and melt with a flame or soldering iron to adhere them to the weave. Next we will slide are plastic barrel slide over the two strands as well. Also slide your snake weave up until the two loops that will go around the bottle are the desired length(approximately 4 inches for this bottle but make it long enough for the bottle you use).
Step 14: Step 14 on snake
Here you can see we have slid the plastic barrel slide on.
Step 15: Step 15 on snake
Here we will make an overhand knot beyond the barrel slide making the whole distance long enough to get your hand through the loop and have a little extra.
Step 16: Step 16 on snake
Now tighten the overhand knot and cut closely the two strands at the end and melt.