A reveller was rushed to hospital after she was glassed at a St Helens town centre bar.
The 37-year-old victim was attacked in Bar 44 on Westfield Street at around 2.30am on December 27.
She suffered deep wounds to her face and was rushed to Whiston Hospital.
She was kept in overnight but has since been released and is now facing a lengthy period of recuperation.
A 25-year-old woman was later arrested over the assault but has since been released on police bail.
Witnesses should call St Helens CID on 0151 777 6804.