If you want an airlock fitted just tick the box or do it yourself!
In food grade stainless, with a nice stainless tap. The top screws on and is airtight, we can drill a hole to take an airlock grommet if required or you can do it yourself. Lid is a generous size so you can get your hands into clean them.
They are not a pressure vessel so need either a vent or leave the lid loose if you intend to put fermenting liquid in them.