Grenade canisters or containers for M8?

These were in the mine box. I am assuming they have nothing to do with the box. I have no clue as to what was in them. I am guessing they are grenade containers. perhaps they were for the M8 mine?

can the contents be determined from the lot # on the container?

From their size, most likely smoke grenades. Sometimes, the binding strap(which has been pulled off from around the seam) was printed with contents. Most certainly had nothing to do with the contents of the crate. Here are some M2s and M8s for reference.

P.S. Nice crate, by the way.