Are these containers really leak-proof?

The lids are designed to seal, and most buyers use them for soups and sauces in lunch bags. Fill them below the rim and press the lid down evenly, since a partly seated lid will leak.

Can they go in the microwave and dishwasher?

Yes, the set is listed as microwave and dishwasher safe. Reheat without the lid fully sealed and use the top rack for the lids so they keep their shape.

Will they stain from tomato sauce or curry?

Plastic containers can pick up color and odor from strong foods like tomato, turmeric and curry. Soaking and washing soon after use limits it, but glass resists staining better.

How do these compare with glass storage sets?

Glass is heavier, oven safe and does not stain or hold odors. This plastic set is lighter, stackable and gives you more pieces for the same outlay, but it is not for oven use.

What sizes are in the 12-piece set?

The 12 pieces are containers plus their lids, in a mix of sizes for leftovers and pantry items. Check the listing's size breakdown before buying if you need specific dimensions.

Can I freeze food in them?

The plastic is freezer tolerant, but leave headroom for expansion and let containers thaw before microwaving. Very full, rigid containers can crack in the freezer.