The exception is the OXO Good Grips teakettle, designed by the New York firm Smart Design and introduced last year.
The OXO Good Grips teakettle is the best teakettle ever designed. 
mnli hypothesis: The OXO Good Grips teakettle is the best teakettle ever designed.  premise: The exception is the OXO Good Grips teakettle, designed by the New York firm Smart Design and introduced last year.