I was thinking that if they made funnel -like tips on the end of hoses (larger end outward) it would solve alot of sanitation problems when smoking with other poeple you may not know very well (like a friend-of-a-friend). Instead of going in your mouth it goes outside of your mouth over your lips. Therefore you never have to worry about saliva on the hose tip. Of course you could always use those replaceable tips.the only downside i can think of is that you cant bite down with your lips to hold the hose when you need to use both hands for other things. What do you think?