Haha, that's true, thanks Hellen.
Since Vince is new at this, I think we should mention that the PT you linked is the "direct" type. That means it does NOT have an in-line battery on the cord. It operates at whatever voltage and amperage as the power supply you plug it into. Your laptop's USB port likely puts out 5V @ something like 500 mA. That isn't enough amps to power an atomizer properly. They sell 5V 2A power adapters, or "wall warts", that work a lot better for that type of PT. They also make those for your car's cigarette lighter. I've read that a *powered* USB hub will also work. You can plug the hub or wall-wart into an extension cord so you don't have to vape on the floor under your desk.
The "indirect" type of PT has a battery box between the switch/atty connector thingy. It is powered by that battery, and the battery is recharged via USB. This type only needs about 500 mA to recharge the battery, so a regular USB port will work.