my cup I drink out of is an old fashioned aluminum measuring cup, lighter than titanium and has the ounces impregnated inside the cup.
but as others have said this is a great thread. a bit time consuming, but I'm gonna try it this year for sheep hunts. my biggest challenge going in is not weight but bulk.
looks like a good way to save some bulk.
but one other tip.
I'd either take one MH meal in it's packaging, or take a clean one emptied of it's contents, with the ziplock resealable top.
use it for your cozy for your freezer bag and then put the whole shebang inside your mad bomber hat to keep it warm.
mad bomber type hat pictured, but I have lighter ones I use for sheep hunts