I have a brand new VV Bogger Boxmod. I purchased the same 8ml nalgene bottles he uses, along with correctly sixed silicone tubing. What is the best way to mod the bottle for use. I'd like to be able to slip my bottles off fom the feeding tube, and just slip another bottle on. I'd like to just cap the bottles when I'm not using them. The bottles that came with it are really difficult to get back onto the tube. Any ideas?