E-pipe style: There are a few 510 thread batteries that resemble a pipe, emulating the sensation of “smoking a bowl.” Most benefit from magnetic adapters, so you're able to easily swap among cartridges by just dropping them in.GuidesGuides 2Guides 3Guides 4Guides 5Guides 6Guides 7Guides 8Guides 9Guides 10Guides 11Guides 12Guides 13Guides 14Guid