Meal Prep Containers 12oz vs 45oz: Which Size to Use
By IRIS USA | Published: 2026-11-01
Category: Buying Guides
Compare 12oz and 45oz meal prep containers, see how a 22-piece combo set covers both sizes, and learn which size fits your portions and routine.
Quick answer
Use the 12oz container for snacks, sides, and small portions, and the 45oz container for full meals or meal components you portion out at home. If you want both without buying two sets, choose the 22-piece combo set.
What each size is actually good for
The 12oz container holds about 1.5 cups, which suits a side salad, cut fruit, yogurt, or a measured snack. The 45oz container holds about 5.5 cups, enough for a full plate or a batch of ingredients you divide later. Neither size is automatically better; the right pick depends on whether you pack complete meals or components.
If you already know your portions, buy the size that matches most of your meals. If you are still testing portions or cook for more than one person, a mixed set removes the guesswork.
The real trade-off: fewer containers or more flexibility
A single-size set gives you a predictable stack and one lid type to manage. A mixed set gives you more options but means sorting two sizes when you pack and store. The 22-piece combo set includes 10 large 45oz containers and 12 smaller 12oz containers, so you can pack a main and a side in the same lunch without buying separate products.
Consider how you will use the containers beyond lunch. Large containers are useful for leftovers and batch cooking; small ones are easier to carry for snacks and small sides. Buying only large containers can leave small portions swimming in space, while buying only small containers forces you to split a full meal across two.
Where these containers fit and where they do not
These are reusable plastic containers made in the USA from BPA-free material, and each container is stackable. That makes them a practical choice for organized home storage and everyday meal prep. The supplied information does not list oven, microwave, or dishwasher limits, so check the product packaging before exposing them to high heat or harsh washing.
If you need containers for freezer-to-oven cooking or fully leak-proof transport of liquids, confirm those capabilities before buying. For basic refrigerated meal prep and pantry organization, the combo set covers both portion sizes without adding a second product.
Trade-offs to weigh before you choose
- 12oz container: portion control vs. capacity: Choose 12oz when you pack snacks, sides, or measured portions. The trade-off is that a full meal may need two containers or a larger main elsewhere. If most of your meals are full plates, 12oz alone will feel too small.
- 45oz container: full meals vs. fridge space: Choose 45oz for complete meals, leftovers, or batch components. The trade-off is that large containers take more shelf space and can be oversized for small snacks. Measure your fridge shelf height before committing to a full set of large containers.
- 22-piece combo set: flexibility vs. storage sorting: Choose the combo set when you want both sizes for different meals and eaters. The trade-off is that you will manage two container sizes and their lids instead of one uniform stack. If cabinet space is tight, confirm you can stack the two sizes together before buying.
Product facts
- Meal Prep Containers 12oz + 45oz Combo Set, 22 Food Storage Containers With Lids: The combo set includes 10 large 45oz containers and 12 smaller 12oz containers, each with a lid. You get both portion sizes in one purchase, so you can pack a full meal and a side without buying two separate sets.
Meal Prep Containers 12oz + 45oz Combo Set, 22 Food Storage Containers With Lids - Meal Prep Containers 12oz + 45oz Combo Set, 22 Food Storage Containers With Lids: The containers are made in the USA from food-grade, BPA-free plastic and are stackable. Stackable containers help keep your fridge and cabinets organized, and the BPA-free material suits everyday food storage.
Who should choose which size
Best for
- People who pack both full meals and small sides or snacks
- Households that prep for more than one person with different portion needs
- Anyone who wants a reusable meal prep container guide in one purchase
Not for
- Buyers who need confirmed oven-safe or fully leak-proof containers
- People who only pack one consistent portion size and want a single uniform stack
- Anyone who needs a specific container capacity not covered by 12oz or 45oz
