I have 2 favorites that even throwing them loose in my vape bag they haven't leaked,
hcigar kayfun 3.1 best kayfun clone out there did research for a good while its a 1:1 clone very nice. The other is new winsmoke squape clone the best rta Ive seen, its actually better than the original, pyrex
tank, e-matel deck different anodized process for the bell/chimney so it doesn't scratch as easily. I hate to say it but it is better tan my kayfun, even though I love my kayfun, lol