Christmas revellers are being urged to be on their guard against having their drinks spiked by date rape drugs.
Ad trailers and posters will be displayed across the country
The Scottish Executive has launched a nationwide campaign urging people not to let their drinks out of their sight when they are socialising.
The scheme was unveiled just days after it emerged that one in 12 nightclub drinks were found to have traces of the drug Rohypnol.
And in two of Edinburgh and Glasgow's night-spots it rose to one in six.
'Time for enjoyment'
The effects of Rohypnol can include dizziness and loss of memory.
Police chiefs, the licensed trade and security staff have joined forces to back the executive campaign.
Deputy Health Minister Hugh Henry said: "The festive season should be a time for enjoyment.
"But sadly, a sick minority of people see other people's enjoyment as an opportunity for crime - and there are few more cynical crimes than spiking someone's drink to make a sexual assault easier.
"Dealing with this problem means raising awareness and stopping incidents
happening in the first place."
A fleet of scooters will target streets with popular bars and clubs across the country warning people to remain vigilant.
Massive 18ft towers featuring an advertisement asking "Who's Keeping An Eye On Your Drink?" will also be placed in Glasgow, Edinburgh and Aberdeen.
Other places due to be targeted include Stirling, Falkirk, Dundee, Inverness, Dumfries, Kilmarnock and Ayr.
The campaign will last for three weeks over Christmas and New Year, but Mr Henry said the executive will continue to drive the message home in the months ahead.
Campaigners claim the use of drugs such as Rohypnol, GHB and ketamine in date rape cases is on the increase.
All the drugs used are tasteless and odourless so they are difficult to detect
According to Central Scotland Rape Crisis Centre, 34 out of 294 female rape
victims claimed they were drugged in 2001.
That climbed to 41 out of 315 last year - 13% of all victims.