Just wondering how water fits into your overall weight limit,
at 2lbs per QT are you already including it as part of you normal
flight kit?
Considering your 3 lb limit I would leave out a hard water bottle
and pack the platy bag.
I would also opt for a HD foil cook pan.
Even an empty nalgene with a SS cook cup will weight together almost 10-11 oz.
yep 6.2 oz 4.9 oz , bottle & cup, thats to much of a weight penalty if you have only a 3 pound total limit.

BTW the RuckSak knife mentioned is well worth having.