If you want to go a step further, inspect the device before use. Look at the bottom air intake—sometimes there's a small sticker or rubber plug that needs to be removed. If it's not removed, you'll get a tight draw and little vapor. That's a common first-time mistake.

Also, check the LED light indicator. Most devices flash when the battery is low or when there's a short circuit. If you press the button (if it has one) and the light flashes rapidly, something's off. Usually it's just a dead battery, but if it's new and it does that, it might be defective.

One more thing: some disposables have a USB-C charging port. If the recipient plans to recharge, remind them to use a low-wattage charger. High-wattage adapters can damage the battery and shorten the device's life. If they're not sure, keep it simple: charge from a computer port, not a wall brick.