From a practical standpoint (whether or not kids think this way) those $3-4 ones are mostly shit, the $6-10 dollar ones are more what you’d want to be using, you’d want at least 2 or 3 in case they run out when you’re out and about and you’ll need a charger too. The refillable tanks on that site (at a glance) use premade coil cartridge things that need replaced (though you’ll probably get a week or more out of them) $12+ for a pack of those and the juice isn’t free either.
From a practical standpoint (whether or not kids think this way) those $3-4 ones are mostly shit, the $6-10 dollar ones are more what you’d want to be using, you’d want at least 2 or 3 in case they run out when you’re out and about and you’ll need a charger too. The refillable tanks on that site (at a glance) use premade coil cartridge things that need replaced (though you’ll probably get a week or more out of them) $12+ for a pack of those and the juice isn’t free either.