Hi guys! It's time for me to move on as I need something more pocketable for my outdoor excursions so if you 've got an INH004 and a Solo would suit you better at this point, here we are. I would prefer one of the later versions with the black cup but if the condition is good I could go with the older version... A PV GonG stem is also included with it's rubber cap. I 'll clean it, I promise! The Solo is bought from PIU.