Zong and Twongs are awsome. I've neaver actually owned a glass bong, they are really expensive. I gotta save what money I have for Nuggets lol.
Try using piping hot water in you're zong. I use it in my gravity bong, I took a half gram of hash in one hit, and hardley felt it. Untill I exhaled. Then the coughing started. lol Great pics, makin me wanna go get one