"CARRY with care?"

 I think they meant "Lift with difficulty!"

"100ltr when filled".
I doubt it'll have shrunk much.
Now then, had it been water 1 ltr weighs 1 kg.

Ergo 100 ltrs, if water, will weigh 100kg; = 220.462 lb = about 15.25 stone, which is about 1.2 of me.

If we say, because it's wet wood, a ltr only weighs 2 lb instead of 2.2, it's still as heavy as me.

And you want me to CARRY it?
You can just...BUGGER OFF!!!

Wood floats, but this stuff is ALWAYS wet when I open it. I must try some & see if/how high it floats.

Oh BTW it's for the paths twixt my new crop of raised beds.

Investigation proved that the "Large" referred to the size of the bark; because "Small Landscape bark" still contained 100 ltrs.