Can these containers go from freezer to oven?

Yes. The borosilicate glass is rated for freezer, microwave and oven use, so it handles temperature swings better than ordinary glass. Let frozen glass warm slightly before a hot oven to be safe.

Are the lids oven safe?

No. The lids are BPA-free plastic, not oven safe, and should go on the top rack of the dishwasher only. Remove them before reheating in the oven or microwave.

How much food does each container hold?

Each of the six containers holds 4 cups, or 32 ounces. That is roughly two to four adult servings, better for batch cooking and leftovers than for single-serve lunches.

Do the lids seal tightly enough for transporting food?

The lids are designed to form an airtight seal that keeps food fresh. They are not marketed as leakproof for tipping or shaking, so carry them upright.

Is this set worth it over plastic containers?

Glass won't stain, warp or absorb odors, and borosilicate handles heat far better than plastic. You trade lighter weight and stackability for durability and cleaner reheating.

Can the glass bases be stacked with the lids on?

The round shape stacks less neatly than square sets, and stacking on the lids puts stress on the plastic. Store bases nested or stacked without lids where possible.