This is what I use. It is by snow peak and the two metal cups one large and one small is called the SOLO. I also use a GSI Bottle cup too. I put the nalgene bottle in the large pot then the middle cup ( GSI cup ) on top of the nalgene bottle then I put the small cup on top of the middle cup. Here are the pics.


Then I put all that into a nalgene water bottle holder.

This is what the shoulder kit looks like.
Then I sling that over my shoulder and away I go.

Bryan