Here is a Tutorial for a simple cafetiere cosy. Great if you are a beginner and want to practise getting your edges straight or evening out your tension. All you need to be able to do is chain and double crochet. You will need a 5mm hook and some aran weight, or thicker yarn.
UK Terms used.
Row 1: Ch50 (approx.. measure the circumference of your jug)
Row 2: dc in the 2nd chain from the hook. Continue to dc in every stitch to the end.
Row 3: ch1 (turning chain) dc in every stitch to the end.
Continue until you have a rectangle that fits snuggly around your jug.
* If your edges are a bit messy, at this point you could do a row of dc around the edge of your rectangle in a contrasting colour to neaten it up.
Re join yarn to place loops with a chain stitch where you are going to fasten a button on the opposite side. Three loops works well one above the handle, one in the middle and one below, again depending on the handle style. This will depend on the style of your handle. I was lucky with this one because I could just make a cylinder sleeve.
Decorate with crochet flowers.