Use clean cartons designed for moving. Boxes obtained from grocery or liquor stores are not always clean, and they may not withstand the weight of the items that you'll be putting in them. Also, their odd sizes tend to make loading more difficult.
This box is great for large, bulky items such as pillows, comforters, coats, towels, sofa cushions. We've even heard of some families keeping this box for their "Holiday decorations box" after the move.