Thanks comms. I haven't been able to find my 1l Nalgene so I haven't had a chance to play with it yet smile.

My initial thoughts are that I'd like the cup to stay with the bottle until I want to use the cup, but it sounds like I'll have to play around with some options to see what will work.
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Victory awaits him who has everything in order — luck, people call it. Defeat is certain for him who has neglected to take the necessary precautions in time; this is called bad luck. Roald Amundsen