OK, so I just read some more and realized that of course some have reservoirs, but the cartridges are refillable of course with these nice little bottles of E-Juice. Looks like they have Mango, Mint, Peach, Watermelon, Cherry and Unicorn Punch flavored E-Juice for vaping. Pretty cool. Have to double check on whether or not the HEMPd vape cartridges are actually refillable or not. I would think they probably are but I haven't seen it yet.