https://www.youtube.com/watch?v=L5LXLWnm23U
Here's a utube of them on a circuit. My Catalyst has the same and I can carry 1 liter smart bottles on each one. Doesn't wiggle or slosh around much that I can tell. I switched the tops to squirt lids and can just grab and squeeze the first 1/2 bottle out to drink or so without taking the bottle out of the holders.