Is Inhalable Caffeine Safe?

I saw a new product on the Internet  today that was pretty unique and troubling at the same time. It is a product made by a company called breathable foods. The product called 'Aeroshot' claims to have all of the caffeine of a large cup of coffee with no calories. How do they do it you ask. It is inhalable. Yes a shot of caffeine you literally inhale. The product claims to have b vitamins and  caffeine in a fine powder that dissolves quickly in your mouth. 'Aeroshot" was invented by a Harvard professor  David Edwards, Dr, Edwards is a pioneer in inhaled insulin, and vaccines.  Would you use 'Aeroshots'?