We hate to burst your bubble, but these new bubble tube bongs are a must have to *round* out your glass collection. Each one features an extra reinforced 7mm thick design with a debossed logo and a wide bubble base. We hate to burst your bubble, but these new bubble tube bongs are a must have to *round* out your glass collection. Each one features an extra reinforced 7mm thick design with a debossed logo and a wide bubble base.