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Start your day with a smile and add a little nostalgia to your morning cuppa with this super-fun Friends Slogan Heat Change Mug. This standard sized black mug initially features the phrase 'THEY DON'T KNOW' as taken from Friends. However, once you pour in your favourite hot beverage the design changes bright blue and the slogan reads: 'THEY DON'T KNOW, THAT WE KNOW THEY KNOW WE KNOW'.
4.99 was £9.99
4.49 was £8.99