I always use a thermos jug when making tea. This time I filled the jug with tea leaves and hot water (around 100 degree celcius). I closed the jug and noticed that the tea was too weak therefore I opened the jug and added some more tea leaves and startet stirring gently with a stainless steel spoon. Almost immediately after the glass in the thermo jug exploded.
My husband is sure that it is common sense to not stir with anything in a thermo jug but I have never heard anything about it and couldn't find anything online.
I would really like to know why it exploded and if it applies to all kind of material or only stainless steel/metals? what about a wooden spoon?