the way i did it and it worked great and kept a good temp was jock strap and whitey titeys. put the qf bottle where the cup would be. it kept it close to my body and the whitey titeys added some extra insulation. it makes it easy to pull out and put back without any noise. though i would practice walking a little with it lcuz it was a little uncomfortable at first till you find a good position for it. i had to sit in a cold ass room for an hour so i kept my legs crossed to help keep in heat. it worked great. and QF is the shit