I had been using this reclaimed "peanut jar" as a re-purposed water bottle mounted on my shoulder straps via shock cord and toggles.

They weigh 1.65 or 1.95 ounces including the cap. Curiously a blue capped one is lighter. and a red capped one is heavier. ;-?
The problem with these is that the caps and the bottles need to be hand washed. Dishwashers generate to much heat during the wash and dry cycle. Their shape changes and leaks around the caps start to develop because the seal isn't perfect anymore.
I moved back to the tried and true 1.8 oz Gatorade bottle.

But lately I've noticed an annoying tendency for them to slip the bonds of my shoulder strap mounted shock cord and toggle water bottle carriers. I believe it has something to do with the bell shape and the weight of a quart of water.
Lately I've moved on to a new reclaimed and re-purposed water bottle.

The Powerade bottle is a 1 quart bottle that weighs 1.65 oz and with its different shape seems to stay put in my preferred method of carry.

Note: The bottles in the picture above are the smaller 20 oz Gatorade bottles.
On a recent training walk with the above pack and carrying one re-purposed Powerade quart bottle on each shoulder strap all went well. The bottles rode well, never slipped out of the shock cord carriers and were easily accessible.
I think the difference is the shape of the top of the bottle. The fact that the bottle weighs 1.65 oz which equals the smaller "peanut jar" is a win, win for me. I've added no extra weight for the bottle and gained some volume as far as the water that I can carry.
Party On,
Newton




