VUP Baby have reduced the price of the Ducky Duck hot water bottle from £22.50 to £14.99, so with plenty winter left, there's no reason not to buy your own little patch of hot water.
The Ducky Duck by Simply Good is a baby friendly, leak proof version of a hot water bottle.
It contains an inner cotton bag containing Cassia seeds that stores heat for an extended time. This can be warmed in the microwave and the Ducky Duck can then be used to warm up baby's tummy, bed, stroller, car seat or any other place. I don't think it actually contains any water though!
Ducky Duck uses synthetic and cotton materials and the outer cover is machine washable.