First couple of months
Hot Water Bottle : use this to warm baby’s bassinet/crib before putting baby in. That way they’re not shocked by the coolness of their bed after being held in warm arms during a feed. I recommend laying the swaddle blanket in the crib first, then the hot water bag. Swaddle the baby for sleep in the bassinet so they don’t have to transfer from warm arms, to cool swaddle then to warm bed.