Despite everything I see as a tip in a day, this is the first time I've seen this one and I'm really looking forward to trying it.
It is a trick for cakes that solves this problem
What is the connection between cakes and a headband? It will be used around the baking pan to prevent the cake from rising to high!
The headband should be soaked with water, then put around the baking pan.
It is very surprising: the cake cooks differently with a wet headband around the baking pan!