The shatter risk is small, depending on whether you smoke at home while relaxing or go about clenching your pipe while active outdoors or in a work place or work shop where dropping it is more likely. Most pipe smokers rarely or never have pipe breakage from dropping. Usually, the pipes do fine, might take a nick or scrape, but aren't damaged in terms of use. For shear durability and low maintenance, I'd go with acrylic, if you don't mind the mouth feel, which I don't. I like Vulcanite a lot too. I don't like the MM cob soft plastic stems, so I buy the series with acrylic stems or refit with Forever stems. Most pipe destruction comes from lawn mowers or vehicle tires, by most reports.