Cannabis vape devices are a hit with consumers -- so why won't they be legal right after legalization?

A cannabis vape pen is essentially an e-cigarette, but for cannabis oil instead of nicotine oil. A rechargeable battery powers a heating element, which vaporizes cannabis oil contained in a replacable or refillable cartridge. (Disposable, limited-used vape pens are also available.)

"Vape pens are super-discreet, so unlike smoking cannabis there's very little odour," said Lisa Campbell, a cannabis portfolio specialist with Toronto-based liquor distributor Lifford Wine & Spirits, which is adding cannabis to its product mix.