Hello every one i just got a couple of the new cappy v4 sunbox bottles. The only issue with them is the cap screw on and off very hard. What is there for a thread lubricant that can be used. It will get into the juice as well. So it needs to be food safe for actualy vaping, and have no taste. As well as work very well. They should have been made with a fine thread but there not. Thanks every i do appreciate it.