420 Science Rez Block is produced to hep keep your bong clean. This case contains 12 bottles of 15 ml. and 12 bottles of 30 ml.
You can change the water everyday but that isn't enough to prevent residue building up inside your bong or water pipe. Tar stains not only look unsightly but also taste awful. Why ruin your smoke? Use Rez Block in the water to really cut down on build-up and maintain a sweet-smelling and tasting bong. Rez Block makes the residue and particles float in the water instead of adhering to the inside walls and is then easily poured away!
This case of Rez Block contains:
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