Acrylic bongs are waterpipes made from plastics/acryl. In general they are quite cheap but extraordinairy durable and come in the most surprising of designs and colours.
It's the great advantage of plastics that they can be put in every desired form and, unlike glass bongs, the don't tend to break when you knock them over. On the other hand acrylic bongs in normal using don't last as long as glass bongs (unless you break them) because a glass bong is easy to clean while an acrylic bong tends to get grimy and/or smelly.
