They don't make un-openable barrels anymore.You can also just pick up the locked and trapped ones that spawn with gypsy, brigand, etc. camps. You'll still have to unlock and untrap them, but once that's done you have free open barrels, plus whatever loot is in them.
Shard SpecificI remember the random tub that would spawn along the road in Delucia. Was a real prize at the time.
I saved four of each, I like weird things. I also have bone containers and a basket that don't show as holding items.The stable in brits castle walls has a load of the tubs and a few barrels that can be emptied then picked up as a container. The true rare is plp that have them (tubs/barrels) empty and not showing as a container. Only empty water tubs and barrels locked down in a house as deco at the time of change show as empty none container. Once filled and emptied they are like all others. think of how few people had empties locked as deco and kept them. Been about 4 years about they changed.
I remember the random tub that would spawn along the road in Delucia. Was a real prize at the time.