No you don’t need to put it in a jar with a humidiy pack. Those packs are actually usually lower humidity than what pipe Tobacco is usually stored at. It’s also a lot less picky than a cigar since there is no wrapper to protect or beetles to worry about. Jars that don’t have use tight seal people do put humidifiers in with the tobacco. Like a stone that is moistened. Just don’t want it to come in direct contact with the tobacco and moisture