ACRYLIC is total waist of money and they are really unhealthy to smoke out of . becors they get hot and makes toxic gasses. me and my friends was smoking 1 night we was 4 or 5 and 1 of my mate had buy a acrylic bong a big peace it smoked good at the first 4 or 6 heads on it and then 1 of my friends got this bad fealing we was just thinking he had to mutch to smoke so we just smoked on and then after 2-3 heads more and 1 more was fealling realy bad like really bad he did say he's lungs hurt and we was kinda getting woride becores we have the same dealer all and know the smoke was the bedst in town and we was 3 left on the bong the other 2 was getting worst and worst we smoked like 6 heads more and then sudently my friend past out we was tripping and i dident know what was up until i did take a look at the bong peace the down stream are made out of alu and the head to and they have this rubber around it to make it air tight. the acrylic and i realiced we was smoking rubber . the rubber melts after a good sesh and my friends was in real danger and we jumped in the car and drove to the hospital with my friend that past out and they all nedet to eat this nasty shit I think it was coal it was some black shit and they was sick in some days . i will never recoment a acrylic peace for smoking ever . this things are deadly if you do not understand it...... they did think we was in a home with a fire in on the hospital. and we told them that we had smoked out of this bong and they just started working fast when we told them that. . !NEVER BUY THIS SHIT IT WILL GET YOU KILLED MAN! 'peace' if you need to buy one then buy a glass bong and buy a 5 mm bong