u-shaped pillow

Well..the other day when I was at Mothercare, I saw a u shaped pillow for breastfeeding, which can also be used for supporting babies to sit...SO, instead of buying one of those bebe pod (which...apparently sold out the other time I went looking for it), I took out my rarely unused breastfeeding pillow and use it to support Emma :) the problem is...she can't sit still!!!