Now enjoy your favorite drink on the go with the stylish PE BIRDS Yogic Vacuum Flask  Whether you need a cup of hot coffee on a cold winter morning or a cold juice on a summer afternoon, PE BIRDS Vacuum Flask is your perfect companion. Conventional flasks do not maintain the temperature of your drink for a long time. This is why the PE BIRDS Vacuum Flask comes with a double wall insulation that keeps the temperature of your drink hot or cold.