With this brutally cold Canadian winter, I really enjoyed coming home and cuddling up with my hot water bottle. I have seen quite expensive ones so I bought a $3 hot water bottle and made my own sleeve. I knitted the sweater using the pattern from Ravelry. It is truly that best pattern that is very flexible regardless of the size of your hot water bottle. The challenging part of this pattern is the seamless cast on which I have never had to use but after seeing the result it gives, I am willing to use it again for future projects. Here is a helpful link to help you navigate the the seamless cast on.