The 18-inch Acrylic Bubble Bottom Bong is the perfect party bong. The Bubble Bottom Bong includes a metal downstem and slide with a carb hole on the back. The carb hole helps clear out the leftover smoke easily and effectively. The slender mouthpiece includes a rubber lip for smooth hits from the bong. The bubble bottom chamber allows you to have enough water for the perfect bong percolation giving you those big smooth hits. These 18-inch acrylic bongs come in a variety of colors.