Onigiri lunch boxes are a real thing—and they work.

Yes, there are lunch boxes designed specifically for onigiri—they’re called bento boxes, and the best ones have a dedicated slot that holds the rice ball in place.

The Japanese have been packing onigiri for centuries, so it makes sense that someone figured out a better container than plastic wrap. Most good bento boxes come with a shaped cavity or a divider that keeps the rice from rolling around, and some even have a separate little tray for the nori so it doesn’t get soggy before lunch. A regular container works fine, but the rice ends up squished against the lid or worse, sticking to everything.

If you’re not into bento boxes, there are also single-purpose onigiri containers—basically a clam-shell with a round indentation. And for other cultural foods, you’ve got options too: Indian tiffin carriers stack steel containers for curry and flatbread, and there are compartmentalized boxes for tacos or sushi. The pattern is the same everywhere—when a food is a daily staple, someone makes a lunch box for it.

Get one if you’re tired of perfectly shaped onigiri turning into a lump of rice by noon. Future you deserves better.