For a bottle to "explode" it would have contained boiling water and the air not expelled. That was down to your misuse.
I warm the bed with an electric blanket, turn it off and take a body length bottle inside a fluffy cover filled with hot water to bed. I also make sure I can see the water at the neck as air expelled, before fastening the stopper.
Just because a few people misuse something, doesn't mean the sensible among us should be prevented from doing so.
Your heading should read "Don't forget to use your hot water bottle safely.!