Vandy Vape created an excellent bottom fill system for the bottle, that keeps it locked in place, and directly in line with the 510 to eliminate potential issues with plumbing inside the mod to transfer juice from one side to the other.
7ml Bottom refilling bottle,directly in line with 510
21700,20700,or 18650 compatible,5 kinds of output mode
Refined shape and ergonomic design,using durable ABS Nylon materials
Size: 82.3 x 54.7 x 28.4mm
Battery: 1 x 21700/20700/18650(Not included)
Output Wattage: 5-95W
Color: G10 Obsidian Black, Rainbow Resin, Sky Blue Resin, Flame Red Resin