Urea cold pack having an inner bag provided with a perforated seal

摘要: In a thermal pack, one which may be provided with ingredients for making it either cold pack or hot three bags are the container of two said being same size and comprising exterior proximate interior liners while another bag lesser dimensions forms inner liner is disposed within larger bags. The designed holding quantity water, outer chemical means use in varying temmperature desired type pack. Rupturing through manual pressure allows water to react creating temperature, as needed.