I use titanium dual coil atomizers. Most vape pens do not allow you to leave the power on for ever. I have one that holds 4 AA batteries and one that holds 3. It can melt the rubber insulator near the threads on the atomizer.
I also blow glass. These pipes are the best. the have a flat bottom so they dont roll around. They have an air hole pushed inward so it wont spill from the air hole. They have a mouthpiece also designed to prevent spilling.