So I've decided to get a Crusader mug for my Osprey 2014 water bottle. But here's where it gets confusing I've seen reference to a Mk2 mug, which would imply there's also a Mk1 out there as well so I'm not really sure what the difference is and which one will fit my bottle? I found a metal lid on ebay which mentioned a Mk2 mug....so...well I'm confused. 
Any advice would be most welcome.
Thanks everyone,
Malc.

Any advice would be most welcome.
Thanks everyone,
Malc.
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