Here you are. There's mech mods
here. These ones are very special ones. They are called squonker boxes or bottom feeding drip mods. You squeeze on the bottle inside the mod to feed juice to your atomizer, usually an RDA converted over to bottom feeding.
All you do then is press your fire button on top of the box. You can take about four to six draws off a squonked atomizer. Then, you may want to give a few more squeezes to wet the wick again. The result is your atomizer keeps fresh juice on hand and any excess goes back to the bottle until you use it up. It makes dripping lots more free of hassle, mess.
And aye, I'm a bonkers squonker.

Hehe. Will be back to it soon, missing it terribly.