Glass meal prep containers can go in the oven. Your office probably isn't ready for that.

Yes, but you’ll need glass (or silicone) lunch boxes — and an office oven to use them.

Most lunch boxes and meal prep containers are plastic or have plastic lids, which melt or warp in the oven. The ones that are oven-safe are usually borosilicate glass, like Pyrex or similar brands, with lids you remove before baking. Silicone works too, but it’s floppy and less common for regular lunch use.

The bigger problem is the office part. You need access to a full-size oven or toaster oven. Most offices have a microwave, not an oven. Even if there’s a shared kitchen with an oven, heating up leftovers in glass at 350°F for 15 minutes is slow, and you’ll be the person holding up everyone’s lunch break. Also, glass gets hot — you’ll need a trivet and oven mitts, and you need to make sure the container isn’t cold when it goes in, or it can shatter.

If your real goal is warming food without a microwave, a portable food warmer or an insulated thermos is more practical. If you genuinely want to bake something like a casserole or a personal pizza at work, a toaster oven with an oven-safe glass dish is your only real route.

Short version: the containers exist, but the office oven is the bigger question.