The eGo One Mega's all leak a little. Best to wash out the bottom everytime you fill the tank. The Tron is about the same but not as bad. EGo One Mega is best to always keep them over half full at all times. The same tank and coil which is better is the Wismec Amor. They sell them a lot cheaper than eGo One Mega. For flavor the three of them are one of the best flavor tanks on the go if you can put up with issues they have. The Cubis is the direct replacement and guaranteed not to leak but it comes with the price of major flavor loss. Good luck in your search. I do not believe anyone that says they own an EGo One Mega and has no leaking problem. I do own multiple tanks of all that I have mentioned here. Plus I own the eGo One. CHEERS!