It is, of course, the big knit.
And this year we're aiming to put a million little hats on our smoothie bottles. A whole million.
Please get involved by knitting as many little hats as you can manage and popping them in the post to us. But be quick, because the deadline's 31st October.
Every time we sell a bottle with a hat on, we donate 25p to charities that help older people to stay healthy, warm and well in winter. Find out all about it (and get knitting patterns and inspiration) over at http://thebigknit.co.uk