Mini 350ml Liquid Nitrogen Can Sprayer with 5 different freeze heads. The 5 freeze heads offer a more accurate and safe handling. The sprayer is lightweight and portable; weighting 0.5 kg ( 1.10 lbs). empty. It is not designed for long storage of Liquid nitrogen but is easily filled with the help of funnel when you're ready to use it. The Cryo Sprayer is perfect for onspot freezing where one might have a wart or other skeen condition treated using Liquid Nitrogen. College professionals such as Chemists or Physicists could use this anywheent. An up and coming use for the cryo Can is in the field of Molecular Gastronomy; a food science that examines the physical and chemical transformations of ingredients that occur in cooking. Some recipes call for LN2. ✔ Attention :There is no liquid nitrogen ire. Liquid Nitrozen Sprayer could be useful in completing an experimnside, for convenient transportation. So you have to buy liquid nitrogen alone locally, thank you for your understanding. (2) It is not suitable for long time storage of liquid nitrogen but is easily filled when you're ready to use it.