I don't think I've even seen anything higher than 50mg on the sites that sell nic for dyi.You can't get 100% nicotine--we're not even allowed to discuss the subject here. Only professional labs with special equipment are allowed to handle 100% nicotine. The stuff is lethal.
If you mean 10% nicotine, or 100 mg/ml nicotine solution, it's already mixed with with PG, VG or a blend of both.
A lot of people are buying nic and freezing it in anticipation of the FDA. I gather it stores well. There's at least one thread on the subject on the forum.Is it better to get 100% pure nic or the nic already mixed into a pg base?