>" I bring a small aluminum pot, plastic cup, and plastic bowl. "
Doing two or three immediately sequential boils is a little to a fair bit more efficient and I also like to be drinking / eating hot food while heating the next pot of water. While it adds 0.5 ounces for an additional tupperware bowl or repurposed cup, I often use those containers during the day to protect fragile objects* in my pack, scoop water, collect drips from a snowfield or rain water off a tarp all of which are little efficiencies of my time and energy.
*Triscuits and Wheat Thins aren't the healthiest food around town, but they're tasty, salty, completely dry, and fairly caloric on the trail. You can also find them in any food store. If I keep them in my tupperware bowl, they're still actually crackers a few days later (although I do try to use them early in the trip). I prefer eating the PB off the cracker than spreading the PB on my palm, sprinkling cracker crumbs on top and licking it all off.