In comparison, "one-hose" systems, where the blast media is combined with the air before the converging-diverging nozzle, tends to be much more powerful and reliable. Universal Ice Blast was purchased in 2012 by the Coulson Group of Companies. In 2015, the company was rebranded as Coulson Ice Blast. Coulson Ice Blast redesigned the technology, focusing around the more powerful and reliable one-hose system. In 2017, Coulson Ice Blast came out with the IceStorm90 ice blasting machine. This was the first one-hose ice blasting machine. Ice cubes are loaded into its hopper. A crusher mechanism crushes the ice into smaller particles, more suitable for blasting. A rotary airlock then transfers the particles into the high pressure air-stream. The ice particles are transported, suspended in the compressed air-stream, towards a converging-diverging nozzle. As the air passes through the nozzle, it accelerates to supersonic speeds. The ice particles are pulled along by drag force and are accelerated to high speed as well. The IceStorm90 is significantly more compact than previous ice blasting machines. The one-hose system also makes it very reliable and much more powerful. Ice cubes can be pre-made and brought to the worksite, or they can be produced continuously by ice cube machines. Coulson Ice Blast is currently the only company to manufacture ice blasting equipment. Ice blasting is a method of industrial cleaning that uses a continuous supply of compressed air to convey and accelerate suspended ice particles to high speeds. The ice particles are ejected from a nozzle toward the surface to be cleaned. The ice particles impact the contaminant covering the surface, breaking it apart and knocking it off. Ice blasting uses significantly less water than pressure washing (around 10% of the water). As a result, one of its main advantages is easier containment compared to other industrial cleaning technologies. A wet spray forms around the surface during blasting, helping to capture airborne particulates and drag them downwards. Blasted off contaminants collect in a slushy pile beneath the blast zone. This means that, compared to other cleaning technologies, a more minimal containment setup can be used. In addition, much less waste is produced, since the minimal leftover slush melts and evaporates, leaving behind only the blasted off contaminant for disposal. Since ice blasting results in less airborne contaminants than other blasting medias and requires simpler containment setups, it is often used for removing hazardous substances, such as lead paint or asbestos, or for blasting in enclosed/indoor environments.