yes, you have to put the teething gums into fridge to make it cool, the coolness can soothe the pain/discomfort of your bb's teeth gums. Otherwise, the teething gums are useless.
My b have started teething since he was 6mths old, now he is 9.5mths old and he got 8 teeths already, I used the cold gums to soothe out his pain every times, it worked well