Bought the beaker base with the glycerin stack and Stax mouthpiece... I absolutely love this piece. It has become my daily driver since I have received it. I don’t use the glycerin coil daily, but it is smooth enough without it. It is fun to bust out that huge frozen glycerin coil out when friends come over though, they are blown away haha! A little pricey, but worth every dollar. Absolutely no regrets.