The Medela bags here small and are WAY overpriced. Try Amazon - even with S & S shipping it works out to about 1/3 of the price. I recommend Lahnisol or Honeysuckle.
Babyshop stocks a great range of Medela products! Their sale is still on, and 80% of the time, Medela products are on sale too! I found these to be the best brand.