Smoothie bowls belong in a wide-mouth food jar

The best thing for a smoothie bowl, yogurt, or anything semi-liquid is a wide-mouth insulated food jar — not a regular lunch box. A lunch box is just a bag. It won’t keep your food upright, cold, or leak-proof. The container does that job.

Here’s the thing about semi-liquid food: it needs a wide base and a wide opening. A narrow thermos is impossible to eat from, and anything tippy will end up as a mess. The solution is a double-wall insulated food jar with a flat bottom and a flat lid. Hydro Flask makes my favorite one (the 10 or 12 oz food jar) — the flat lid means you can stack a sandwich or fruit on top, and the wide mouth is actually spoon-friendly. Stanley and Klean Kanteen make solid alternatives.

If you’d rather go the meal-prep route, heavy glass bowls with locking lids work too. Glass is heavy enough that it doesn’t slide around in your bag, and the snap-on lids are genuinely leakproof. Prep Naturals and Ello make good ones. Just make sure the bowl has a wide, flat base — anything rounded is asking for trouble.

Whatever container you pick, pair it with a lunch bag that has a stiff, insulated bottom. A floppy canvas tote will tip everything over no matter how good your jar is. A cheap cooler bag works better than a fancy lunch tote for this exact purpose.

Buy the container for the food, not the bag. The jar is doing all the heavy lifting.