A lot of people are curious about what's actually inside a disposable, as unlike other kits you can't see the coil and e-liquid. Inside your device's plastic body are the same key components you'd find in any other type of vape kit.
There's a battery that heats up your coil, this coil then vapourises the e-liquid inside turning it into vapour, and the vapour travels up through the device until it reaches the mouthpiece where it can be inhaled. That's all there is to it, just the same combination of battery, coil, and e-liquid found in every kind of vape kit that offers a less harmful alternative to cigarettes.