I want to invent bong water flavoring. It'll come in a vial with a dropper and you'll just put some drops into the water and voila! The water wil be a cool color, and the smoke you pull through it will taste delicious. And maybe it's specially formulated so that it helps keep your bong clean. Or makes the smoke healthier. Hell yeah.

So everyone knows if you want cool hits from a bong ice will always do the trick. The problem with ice is that it melts and makes you have too much water in the bong. Metal is better at transferring heat than water so you could make some copper pipe into a corkscrew shape to slide into your bong. You would leave it in the freezer when your not smoking. The copper would look kind of like the springs in your car but only big enough for your bong. Not only will your hits be colder...you wont have to pour out extra water. And this thing is reusable