I have two different rigs depending on what I am doing, how much gear I need. If I am traveling light I use a Nalgene Canteen & cup combo from the Canteen shop. But if I have a bag with gear, I like my Stainless bottle and cup from the Pathfinder Store. On Extended treks I bring both for a complete cook set. I have the stove options for both as well. I highly recomend the stove ring for the pathfinder bottle, as it helps it nest much tighter (quieter)
Pathfinder bottle set
Canteen shop kits