Bubble hash is refined hashish that bubbles when smoked. The name was coined by Bubble Man, the Canadian hashish innovator who created a hashish sieving system that uses ice, water and multiple levels of screening in order to remove the resin gland heads from the cannabis plant material, and to further remove any impurities from the hashish leaving a very pure resin. The use of only water and multiple levels of sieving to isolate the concentrated material is ideal for health-conscious consumers and/or medical patients for whom which chemical processing is un-desirable or possibly a health risk. Ice water hash and ice water hash systems were available, namely from Mila of Amsterdam, but they used a minimal number of screens.
