PrepNaturals 8 Pack 36oz Glass Meal Prep Containers

The short version

Eight 36 oz borosilicate glass containers (check the current price on Amazon). Expect to pay roughly three times what an equivalent plastic set costs, and what you get for the difference is glass that does not stain, does not hold smells, and goes from freezer to oven to dishwasher. Amazon shoppers rate the set above 4.5 stars across more than 50,000 ratings.

36 oz is bigger than people expect

Each container holds 36 oz — a little over a litre. That is a generous single portion or a modest double, and it is the main thing to get right before ordering. If you are portioning lunches for one person, 36 oz will usually be more volume than you need, and the same range is sold as a 5-pack of 30 oz containers for smaller portions.

These are single-compartment, so nothing keeps a wet component away from a dry one. If you want rice kept separate from sauce, you want a divided container instead.

What borosilicate actually buys you

Most cheap glass storage is soda-lime glass. This set is borosilicate, which copes better with temperature change and is why the listing can call the containers oven-safe as well as microwave, freezer and dishwasher safe. The lids are dishwasher safe too, and the set is listed as BPA-free.

It is not indestructible. No glass likes a sudden jump from freezer to hot oven, borosilicate included — let a frozen container stand before it goes into heat.

Getting a genuine seal

• Seat all four flaps and press until each one clicks. A single unseated flap is a leak in a rucksack, and that is where most leak complaints come from.
• Let food cool before sealing. Trapping steam is what makes lids bulge and seals fail.
• Avoid extreme temperature jumps in either direction.

The two things reviewers complain about

The snap-lids take practice: the flaps have to line up before they seat, and people who report leaks are usually reporting a lid that was never fully closed. And the containers nest tightly enough that pulling a single one out of the stack is fiddly. Neither is a defect so much as a characteristic, but both are worth knowing in the first week rather than the third.

Who it suits — and who should skip it

Buy them if you cook once and eat three times, and if your plastic containers have gone cloudy and permanently smell of last month’s curry. The see-through, non-staining part matters more than it sounds: the usual reason meal prep collapses is not the cooking, it is that Wednesday’s food looks unappetising and gets left. Glass helps with both halves of that.

Skip them if you carry lunch in a bag every day — eight glass containers are heavy, and a single one is noticeably heavier than its plastic equivalent. Skip them too if glass prices for storage are hard to justify when a plastic set is a third of that; the case for glass is real, but it is a comfort-and-longevity case rather than a necessity.

Common questions

How much does each container hold?

36 oz, a little over a litre. The 5-pack version holds 30 oz per container if that suits your portions better.

Can they go in the oven?

The glass is listed as oven-safe. The lids are not — those come off first, as with any plastic-lidded container.

Are the lids dishwasher safe?

Yes, and so is the glass. The set is also listed as BPA-free.

Do they leak?

Not when the lid is properly seated, which means pressing each of the four flaps until it clicks. Most leak reports trace back to a flap that never seated.

Are they worth it over plastic?

At roughly three times the price, that depends on whether staining and retained odour actually bother you. If your plastic set still looks and smells fine, there is no urgent case for switching.

We have not personally tested this product. Everything above is drawn from the live Amazon listing and from patterns in public buyer reviews, checked on 2 October 2026. Prices and specifications change over time.