Drinkers in Norfolk are being warned of counterfeit vodka that could cause death or blindness.
Genuine bottles have different markings from fakes
Norfolk Trading Standards said the bottles of fake Glen's Vodka have been found on sale in Norwich and Dereham.
A number of warnings have been issued this week, with a similar alert in Northamptonshire on Tuesday.
Trading standards officers said the fake Glen's Vodka contains high levels of methanol and has a peculiar taste, which causes a sore throat.
Sophie Leney, from Norfolk Trading Standards, said: "Whilst the liquid contained in the bottles that we have seized has yet to be analysed, we are confident that it is counterfeit.
"Because of this I would like to warn consumers who have recently purchased Glen's Vodka to study the bottle very carefully, as such counterfeit vodka can be potentially lethal."
The 70cl bottles are identifiable by a mark for Allied Glass Containers with a small AGC logo on the base, and the marking 70cl 58mm C12173 just up from the base.