Is the OXO Smart Seal container really leakproof?

OXO rates the Smart Seal lid leakproof, and the silicone gasket presses down to seal the rim. It holds soups and dressings, though a badly seated lid or worn gasket will leak.

Can it go in the oven and microwave?

Yes. The borosilicate glass is safe for the oven, microwave and freezer. Do not put the lid in the oven; the lid is for fridge, freezer and microwave use only.

How much food does 3.5 cups hold?

About 28 fluid ounces, roughly two to three lunch portions of leftovers. The rectangle measures 8 by 5.5 by 3.2 inches, so it stacks neatly.

At $14.99 at Cooks on Main as of November 4, 2026, it is a fair price for a single borosilicate glass container with a leakproof lid. Compare per-container cost if you need several, since sets often cost less each.

Does it come as a set?

No. This listing is one 3.5-cup container with its lid. OXO sells these in multi-size sets separately if you want a full set.

Is the lid dishwasher safe?

Yes, the lid and glass are dishwasher safe. Place the lid on the top rack and check that the gasket is seated after washing.

OXO Good Grips Smart Seal Leakproof Food Storage Containers

Q: Where is the OXO Good Grips Smart Seal Leakproof Food Storage Containers cheapest?

At Cooks on Main, for $14.99, as of our latest check.

Q: Where can I buy the OXO Good Grips Smart Seal Leakproof Food Storage Containers?

4 stores we checked sell it, including Walmart, Abt Electronics & Appliances, Cooks on Main, winestuff.com.

Best price now

$14.99at Cooks on MainObserved at 8:43 AM

Compared across 4 stores. Prices are checked against each store and labelled with when.

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Our take on the OXO Good Grips Smart Seal Leakproof Food Storage Containers

A single 3.5-cup borosilicate glass rectangle with OXO's Smart Seal lid, which presses down on a silicone gasket to lock in liquids. The glass goes from freezer to oven to microwave and is dishwasher safe, so it handles leftovers, meal prep and reheating in one dish. The best new price is $14.99 at Cooks on Main as of November 4, 2026, with 4 stores selling it new.