Can these jars be used for water bath canning?

Treat them as storage jars first. Budget one-gallon jars usually have thinner glass and looser lids than canning-grade brands, so they are safer for dry goods, cold brew and fridge pickles than for heat-processed canning.

How much do they hold?

Each jar holds 128 fl oz, or one gallon. That is about 16 cups of liquid or a large bag of flour, rice or oats.

Are the lids airtight?

They close with a standard screw-on lid, but owners of budget jars often report weaker seals than branded jars. For long storage of dry goods, check the seal or add a gasket.

Can they go in the fridge or freezer?

They fit most fridge shelves, but leave headroom when freezing liquids, since water expands and can crack thin glass.

The wide mouth lets a sponge reach the bottom. Hand washing is safest for the lids; check that the glass is labeled dishwasher safe before using a machine.