E-liquid typically consists of four primary components: propylene glycol (PG), vegetable glycerin (VG), nicotine, and food-grade flavorings. These ingredients combine to create the vapor and flavor experience in electronic cigarettes.

Disposable vapes offer convenience as they can be used and discarded without the need to carry e-liquid. Refillable vapes, while requiring maintenance and separate e-liquid purchases, are generally more cost-effective in the long run. The choice depends on individual preferences for convenience versus economy.