Rare, but some disposables are built with summer in mind. These have reinforced seals that hold up even when the device sits in a warm car for an hour (though we don't recommend that). They also have a consistent power delivery, so the last 20% of the battery doesn't produce weak, wispy hits.

Build quality is where you see the difference. High-end disposables use thicker plastic or metal bodies that don't flex when squeezed. The mouthpiece is often designed to minimize spit-back, which is more common when e-liquid thins out. Some even have a small indicator light that tells you when the battery is low, so you're not caught off guard in the middle of a hike.

Another mark of excellence is flavor stability. In heat, some flavors become harsh or muted. A top-tier device uses nicotine salts and flavorings that hold up better at higher temperatures. You can't always tell from the box, so read reviews or ask in the community. If you're loyal to a particular brand, see if they offer a summer-specific line or have updated their formulation.