This Silika Glass Ball Beaker tube with color accents is an example of a relatively recent trend in glass art – minimalist rigs with single color accents. No elaborate ornamentation, horns, marbles, or reversals/wags – just a well made boro tube set off by solid colors. It’s a striking design so the popularity is no surprise. In this case this Silika Glass beaker tube is set off Baby Blue Cheese glass accents, and it pops as you can see in the photos. A classic tube with lots of functionality from Silika Glass – founded right here in the PNW and 100% American made! 14mm male joint.