This Bubbler is super thick. The bottom of this bubbler has about 6” of xtra glass gathered and melted down to create about an xtra 1 1/2” solid bottom for durability. Also we have added a full two color down stem with polished Grided Slits for maximum percolation. Monarks new Signature full color Screen Bowl for all new Designs was also added to this bubbler as well as The Monark “M” Logo Embossed on the side of the beaker.