Unfortunately, I found the price is relatively high, especially because many suppliers have additional shipping costs. But there is a possibility to save considerably: If you buy two packets so they cost only 10.40 EUR. With 5.20 Euro / packet, it is significantly cheaper. However, here comes yet to Porto.
Who wants to save even more (and larger quantities consumed), may also buy the same 10 pieces. The price per packet corresponds approximately to that of 2-bid, but you can save for four deliveries postage, after all, about 12 EUR.
For 2-Offer:
; Qid = 1403703555 & sr = 8-10 & keywords = milk powder
For 10 offer: