The mouthpiece tip is one of the giveaways for me. The tip and the glass holding the substance looks exactly like what I would purchase when I was in Colorado last. Also the yellow substance appears to be thicker with how the bubbles are formed in it. Nicotine vaping juice tends to be less viscous and those bubbles would be either not there or at the top of the cart. Cannabis wax is much more viscous and tacky and bubbles would suspend in it like it is showing here much more easily. Also the amber color of it is a pretty good giveaway.

Source: former cigarette smoker turned former Nicotine vaper. Currently cannabis smoker and vaper.