The cap on bottle size won′t affect vapers using MTL kits, but, sub ohm vape kits get through e-liquid a lot quicker. Shortfills offer a cost-effective alternative to buying lots of small bottles. Available in a range of sizes: 50ml, 100ml and 150ml, a shortfill is an underfilled bottle of nicotine-free e-liquid. There′s room in the bottle to add nicotine shots, and the 0mg e-liquid dilutes the nicotine content of the shot. For example, adding an 18mg shot to a 50ml shortfill will create 60ml of 3mg e-liquid.