Available at dispensaries are highly-concentrated oils and resins, all extracted from extraordinarily potent strains of the marijuana plant. Some of the oils are packed into cartridges for use with a vape pen. Some of the extracts are made into lotions and transdermal patches. Others are processed into concentrates that look like congealed ear wax or frozen orange juice. Another variety, called "shatter," looks similar to brittle, hardened corn syrup. All are essentially variants of what the industry considers butane hash oil (BHO).