In accordance with some embodiments of the present disclosure, a circuit comprises a balun configured to receive a radio frequency signal at a first input port and a second input port of an input coil. This system may allow per-primitive operations to be performed in the geometry chips, and also allow use of a vertex data interface for sending vertex data to the rasterization chips. An anti-foam venturi and spout mixes chemicals with the water and minimizes foaming when filling a bottle. The sound generation system further includes a sound generator attachable to the support frame of a bicycle wheel. , wherein the liquid reaction phase has a viscosity of from 6 to 20 mm2s, at least in the first polymerization stage, is described.