I personally prefer the vials to the powder because I am an IM user and I will not IM Ketamine that is an form other than liquid from a sealed vial. I don't trust converting it to a liquid because of even the slightest of adulterant that might be in the product. So if any of you Ketamine vendors are opening vials yourself and making the powder/crystals let me know so we can arrange an order for the vial instead.