Blown glass is an artisan craft that involves shaping molten-hot glass with air. Usually multiple colors of glass are used, creating a design effect.

In California, there are many hand blown glass artists that make pipes and bongs for smoking weed.

Hand blown glass pipes, bongs and pieces are more expensive and are considered both useful and collectible.

Many cheaper glass pipes and bongs are made to resemble the styles of artisan handmade glass.