Funny that tupperware has become a generic term even though it's trademarked. Most people use off brands or Rubbermaid. It's rare for me to see a genuine Tupperware container.

So anyway

I bring all kinds of food in all kinds of containers. Really, anything works. But I do not want to warm food up in a plastic container. I'm concerned about plastic getting into food. I bought a real dinner plate at Target and keep it at work. I can heat food up on that. Or I can use a Pyrex or off-brand glass container. Of course, that weighs more to carry back and forth, but it doesn't bother me. Ziploc bags are great for some things.

Sometimes my wife or I will make dinner big enough that we can have leftovers for lunch. That's nice.

I also walk to the supermarket near work once a week or so and stock up on staples. There's a fridge at work, and I keep bread (in the freezer) and cheese and peanut butter and jam. Sometimes I'll have pickles or kimchi, but my cow-orkers have reported that kimchi is kind of stinky, so I may not keep that at work any more. Some fruit is nice, too. I might have some carrots or celery to munch on.

I've made quiche for myself a few times and I want to get back into that. My wife doesn't eat it, so it's just for me. A quiche can last two or three days, so I can bring a slice or two in each day.

Every week, sometimes twice a week, I roast cashews at home. I bring them with me and munch on them at my desk. They have so many calories that I can sometimes skip lunch or have half of a normal lunch. I use a cast iron skillet, cooking oil, and spices. It takes a few minutes. Freshly roasted nuts are so much nicer to eat than roasted nuts I buy at the store. I've had friends and cow-orkers taste my nuts, and they really like the flavor. My wife used to be into almonds, but lately, she's into walnuts. They're all good. Peanuts (not strictly nuts) are good, too, and they cost a lot less. I do not let the nuts cool in a plastic container, but I'm OK with storing them in one after they're cold.

Sometimes on my supermarket runs, I buy stapes for lunches and a few groceries for me to bring home. The added weight isn't bad, and it saves me time at home.

Hard boiled eggs are a good cold lunch, and they're portable. Same with sweet potatoes. They're both decent finger foods, easy to clean up after.