The thumbnails list is nice!
I use one of these without a lid as my mug (16 oz size, 0.8 oz weight):
Other things you could think about:
- going cookless
- cut back on non-essential small stuff (bandanas, towel, sacks)
Edit: I actually wouldn't cut back too much more, other than maybe a lighter pack and mug. You'll likely end up cutting things out, spending money, and then adding the same things back in later.