When you are working vertical intarsia stripes, such as those on Sarah Dennis's 'Chilly Hugs' beer cosies (pictured above, as featured on page 56 of Simply Knitting issue 146), you will need a separate ball or bobbin of yarn for each block of colour. The yarn is not carried across the back of the work, so it is essential to twist the yarns on the wrong side of every row to ensure a neat join between colours. If you always twist the same way, the yarns will untangle themselves on the following row.
