User: Where can I buy liquid nitrogen?
Answer: General gas companies have liquid nitrogen
User: How to find a gas company?
Answer: the region + gas company
User: Can liquid nitrogen be delivered to your door?
Answer: Some gas companies provide door-to-door filling and need to pay a delivery fee. For details, you can ask the local gas company.
Liquid nitrogen is extremely cold and if it touches your skin, you will be burned , Be careful during use
Related Reading : How can liquid nitrogen be used safely?