Might as well join this party, despite the fact that my method does involve use of a microwave. DH still works and gets up long before my brain will actually function. My method involves the use of talenti Ice Cream containers. I come by my possession of them honestly. I'd never heard of the stuff until a tenant moved out of one of our houses. He left about 50 of these cute containers on a shelf in the garage. Why yes, he was obese and an asshole to boot, which is why his wife finally left him, leaving him to deal with whatever remainded, which is how I came to be in possession of said containers. BTW, they must be hand washed or they will melt. And then you will have to buy more talenti Ice Cream at exhorbitant prices, but, man is it good!
Every other month or so, I fill up each container with 1/2 c. Old Fashion Oats. Then I add unsweerened coconut, about a dozen dried blueberries, cinnamon, nutmeg, allspice and cloves. I screw on the lid, give it a good shake and stack them in my pantry.
The night before each workday, I dump the contents in a small earthenware bowl. (The sides are about 5" high, so no boilovers.) I add 1 cup of cold water, which is conveniently exactly where the "t" in talenti is crossed, so no measuring cup required. I stick the bowl in the microwave before I go to bed. In the morning, I set the micro for 2'30", and voila, perfect oatmeal, minimal thought or effort required. I top it with a dollop of plain whole milk yogurt and some fresh berries.
I agree that flaxseed and chia would make good additions*, but I've always heard you should grind them just prior to use, and I'm not doing that at 4:45am, so I save that for my weekend waffles. Oh, and I buy everything in bulk at Costco, Winco, and the 99 Cents Only Store, so it's super cheap, even with fresh berries.
*I tried a shake of Turmeric once, but my very un-picky DH said it tasted like dirt, so learn from Dicey's mistake.
Note: canning jars would also work, if you happen to have a supply of them, and they're dishwasher safe. You probably won't have as weird an acquisition story, because canning jars are pretty ubiquitous. It's also a good use for older jars that you don't fully trust in the pressure cooker any more.