We should be able to build crates from wood.
One crate could store one stockpile. You could then seal the crate and then lift the crate and store it in a knarr for example.
You could open the crate with a crowbar and then get items of the stockpile out of it.
Crates would break when opened, so you couldnt re-seal them.
They would primarily be used for trading and transporting goods