I just purchased two cups over on mc_sales, and want to be able to sterilize my cups once they arrive. I've got a small Lunette and a large Feurcup headed my way, and I would like to be able to boil them if possible. I looked all over Lunette's website, but couldn't find any recommended boiling time that was safe for that cup. Feurcup I couldn't even navigate the site, so I'm asking you all for your help! Does anybody know how long to boil these cups?