Rolling pin
What's it good for? Warming your feet
Cold feet makes you more likely to develop a cold, but one of the easiest and most relaxing ways to heat them up is with a rolling pin. Try sitting down and gliding your feet over the pin on the floor.
This will also help to stretch out the tendons on the base of the foot which are easily aggravated after a busy day on your feet. Try getting someone to massage your back with one!