Hi. My son wants to create a gift of a photo collage mug for his friend and wants to cover it in photos of ducks ( is an "in" joke). I have searched for photos of ducks on line of which there seem to be loads and then loaded them up to the mug on line (I am currently using snapfish). Every single image I try flags up as not being high resolution enough and that it may not come out clearly when the item is produced. Anyone got any great ideas how I can combat this or where I might get better quality images? Thanks very much.