Patterning, adding different color, the variety of shapes. A very nice video of converting of molten glass to a refined and functional bulb for hookahs. Final work with patented metal parts of hookah is also demonstrated in the video. Thick glass vases of Friendly models are stable on any uneven surface. Besides, they have a large volume for excellent smoke filtration. Friendly hookahs create a special tranquil mood for smoking lovers.