Not all disposables are equal. Some are designed for heavy use—bigger e-liquid capacity, higher puff counts. Others are lighter, meant for occasional puffs. If you're buying for someone who'll keep it on their desk and take a few puffs after dinner, a smaller device might be a better fit. If they're a chain-vaper who'll finish it in a weekend, go bigger.

Take the LINQ-SLIM or AURA, for example—those are compact, sleek options that work well for light, home-based use. On the other end, VERTEX-25K or VERTEX-15K give you longer life for heavier sessions. The point is to think about the recipient's habits, not just the looks.

Also, consider how they'll store it. If the device is going to live in a kitchen drawer, that's fine. If it's going to sit on a sunny counter, that's a problem. A little note in the gift card about storage can save a lot of disappointment.