There is a sticky on shipping bettas in the care section. Pack them like that for the best, least stressful transportation. Heat pack would be optional depending on the weather. I lay my bags sideways to allow them to get air more easily and to avoid tail biting.
Who am I? Well I am a Junior Member of the International Betta Congress and a breeder of white HMPKs, red dragon HMPKs, black/red dragon HMPKs, metallic multi HMPKs, blue masked HMPKs, and now multi color HMs. Soon to add black HMs. I will be showing in New Breeder class in fall of 2012.