Thanks but no thanks

I have heard of the phrase "thanks but no thanks". can anybody suggest the situations where it can fit well?

thanks.

thanks, but 'No, thanks'! Prob. orig. more common in US than in UK and the commonwealth: since c. 1955. 'A polite refusal, but often ironic -- that is, the offer refused had been no favour' (R.C. 1978)
From Dictionary of Catch Phrases: American and British, from the Sixteenth Century to the Present Day by Eric Partridge & Paul Beale

thanks but no thanks is a hackneyed phrase which is used to convey an emphatic rejection, 'We're reducing the budget and we've had to make you redundant but we can re-employ you on a short-term contract'. 'Thanks, but no thanks'. It is often rather an impolite rejection, a fact which is made clear only by the tone when spoken. The popularity of the expression dates from the later part of the twentieth century.
From _Cliché_ by Betty Kirkpatrick