These are NOT Whitefriars glasses. They quite often appear described as HARLEQUIN sets. Whitefriars made Harlequin sets of various smooth walled glasses in the early sixties. Quite subdued colours as there were then.
Glasses in the Glacier range did actually come in colours though. In 1970 only, M31 & M32 Whisky Glasses came in Arctic Blue, Twilight and Flint. After that any Glacier glasses only came in Flint apart from 1971 when they also came in Silver!
There were Glacier bowls, fruit dishes and Sundae dishes that came in colours.
M143 bowls and M146 Sundae dishes came in Flint, Silver and Twilight between 1971 to 1973.
In 1974 only, M152 party dishes came in Flint, Kingfisher, Lilac, Sage and Tangerine. These were as colourful as any Glacier item got!
Oh! One more Glacier piece! The Pattern 9822 Whisky Water jug introduced in 1974 came in Kingfisher, Ruby and Flint.
Glasses like yours have been discussed before on the old Whitefriars Yahoo group forum. A few collectors have bought them. It is generally thought that they are machine made where as the Whitefriars Glacier glasses are mould blown. I do not know the manufacturer but they may well be by Ingrid Glashutte of Austria. Hard to say though.
I have also posted this on www.whitefriars.com
I hope this helps.