The cosy comes off so you can wash the mug and the mug is dishwasher safe. I had been eyeing up the knitted cosys on ebay a few months ago and was tempted to buy one. I didn't because they range from £3-£10 auctions and BIN and you need to have a mug it would fit as they didn't come with one. They are homemade and I'm sure worth every penny, I'm just too lazy to measure my cups to make sure I had one it would fit. The other problem is most are auctions and I was always outbid!! This was apparently a B&M Bargains great find, because it was £2.99!! Mug included. (Yes I asked for details so I could share with you). I'm hoping to see them when I go shopping next to get another, in a different colour :)
I hope you had a great Christmas and made the Nice list!