You got to love these THC oil vape cartridges, they are discreet and powerful! Another great feature is they save a lot of time from having to roll up a join and than take 15 minutes to smoke it. I live in California and vaped a lot of different hash oil cartridges. I made a list of the 10 top best prefilled cartridges in 2018. Let me know if you agree or disagree with my list and why. Also what are you vaping? And Finally, dont forget to bring a towel.