I forgot to mention two new innovations to personal vaporizer:

Cartomizers: these are cartridges and atomizers in one single unit. They cost a lot more (P250 each) but instead of putting in 3-10 drops, you can fill it with 1.8ml of e-liquid and this should last you the whole night!

Passthroughs: There a seller who sells an eGo passthrough in tutuban. It costs just P1,200 and includes just the battery, an atomizer, and the USB charging cable. What's good about it is that you can use it while charging and it has a 650mah battery which means if you remove it from the charger, you can still use it for almost half a day.

Low Resistance (LR) atomizers: these atomizers heat up quicker and they run hotter, giving you more vapor and better throat hit. Down side is you can only use them with the stronger batteries (650mah, I think) and they have shorter lifespans.