We all know cannabis oil is UV and heat sensitive. Our customer wants to put their oil into cartridges which is UV proof so that they can let end user taste their pure and original oil without degration. 

All cartridge in market is not UV proof no matter glass or plastic, and ordinary painting on reservoir will bring in harmful elements which is a big violation to FDA compliance.

Our customer dominates female markets in this industry, their oil profile is so unique which combines CBD, THC and a pretty large amount of terpene. 

Their oil has a much lower vaporization point and its rich terpene requires a slow and tender heating curve to deliver full flavor and effects.

Generic disposable pen does not regulate output power and heat coil to red immediately and it damages its flavor as soon as oil touches red coil.