The Rocket Tank  - 17 Gallon Stainless Steel Bubble Hash Machine Wacky Willy designed this industrial 17 gallon Rocket Tank using 304 medical grade stainless steel. Like no other, this tank system agitates botanical plants, bud and flower with the force of compressed air or CO2.  It is designed to successfully remove plant trichome heads from plant exteriors using ice and water or solvents. All surfaces that touch your product are 100% medical/food grade and the tank can be easily disassembled for professional cleaning.