TDoT(15): Something or someone you couldn’t live without, because you’ve tried living without it

My hot water bottle. It's like a security blanket. Without it I struggle to sleep. I have tried to not use it, hearing the jeers of my friends. I had to have it back. It has to be above 25 degrees (celcius) for me to not want it. Seriously. This is Thirty Days of Truth. I cannot lie.