I have subbed before successfully. I have used a thin plastic pouch with surgical tubing though. Your going to use a bottle. If you get a quality ziplock bag(so it doesnt spill) microwave your sample for ten seconds, stick it in the ziplock bag, put it down your pants(or tape it around your waist, right above your hips, where your pubes start) check the temp half way through the drive, u should be good to go! Easy Breezy, Japanesey!