This may not help too much. Lots of people try to nest their cup into a cook pot. I go the other way around. For a bowl/mug, I use a recycled plastic margarine tub, and mine weighs 0.4 oz. I believe it has a capacity of 15-16 fluid oz. I nest my cook pot into the tub. Then, for a storage bag, that all goes into my mosquito net head bag.
For a sleeping pad, I use only two pieces of foam that add up to 4 oz., plus whatever clothing I am not sleeping in, plus the empty pack. My clothing used that way tends to be down, and it is not great to have the down compressed under me. However, that is a little bit soft, and it keeps the down warm in case I need to put it on in the middle of the night.