Nowadays, air mattresses are all the rage, and they indeed deserve to be so. They are easy to pack, inflate, and even use for different purposes. To stay warm on an air mattress, you should add some heat by filling a water bottle with hot water and placing it between the sheets a few minutes before you get into bed. However, be careful not to use boiling water because that may put you at risk of getting burnt. Read on to find out more tips on how to stay warm on an air mattress. Invest in...