Grav and 420 science never let me down. The Great quality you expect from grav and the best customer service from 420 science, that I have also become accustomed to.
Best bubbler out there
It has almost no drag, and works like a charm. Its fun to hold and look at and it functions perfectly. I use it for flower. Great purchase
This piece stacks!
Not a heady piece but I've come to love the lack of color. Basic, very discreet unassuming bubbler. Thick glass which fits perfectly in your hand. Low draw resistance without any splash back is key. Fill with about 1.5"-2" of water and this piece drops bombs. I married this with my vape + water pipe adaptor and couldn't be happier. I'm definitely going to look at other Sip series pieces.