The 'six-pack' lunch box is the big-appetite winner.

For big appetites and big meal prep, the smartest buy is the 6-compartment meal prep lunch box — the one sold under names like Fitpacker, Rbx, or a dozen Amazon brands — because it holds about 36 ounces (roughly five cups) and keeps your food separated instead of letting one flavor ruin the whole container.

I’ve tested a few of these. The compartments are genuinely generous: two big sections the size of a palm, four small ones for sides and snacks. That’s enough for a double chicken breast, rice, veggies, and a couple extras without stacking anything vertically. Most are microwave-safe, dishwasher-safe, and come with a hard outer shell that won’t crack when you drop it in the parking lot. Expect to pay $20–30.

The only real downside is size. It’s a chunky brick, so it eats up fridge space and won’t fit in a small backpack. If you need hot food and hate plastic, a stainless steel tiffin (the stacked Indian-style tin) gives you comparable volume with less bulk. And if you don’t mind all your food touching, a single big container like the Rubbermaid Brilliance 3.2L is cheaper and just as big.

Get the six-pack style if you want portion control and separation. Get a tiffin if you want hot food or a more pleasant lunchbox experience. Either way, skip the cute little bento boxes — those are for birds.