Works pretty well
I found these canisters much better than the ones they rent at Yosemite. For one thing they're much lighter and they're also transparent so you won't be digging through everything. One thing I have to say is I found them to be a little more difficult to open once I was out in the wilderness rather than in the comfort of my own home. Maybe it was the dirt that was inside the threading or due to the cold and my hands were fumbling. But a coin will do the trick.