One of the few opium pipes that can be found on bar and can be picked up by the player. Go to one of the two opium rooms or room of Campbell Sturrock, who can be found on the second floor of the Slaughterhouse (however, the player will need the opium disguise for this to work). Put the opium pipe on the table (or if in Campbell's room simply just drop it on bed).
When a person takes opium pipe they will pass out after few seconds and you will be able to take all things from their inventory. This will also prevent them from alerting guards, which can be useful when killing both Campbell Sturrock and Andrei Puscus.