PROFESSIONAL GRADE - Royal Massage cupping jars are made of premium medical grade molded glass that is hand polished and free of rough edges. Extra thick glass enables better suction. VARIETY - Sold individually or in a variety of sets allowing you to custom build your own set. Offered in jars sizes #1 through #5 ranging in diameter from 2.25" to 3.75". EASY GRIP = #3, #4 and #5 sizes have finger indentation grips allowing for easy maneuvering and removal of cups after treatments are completed. FLAT EDGES - Each jar has a flat top and bottom allowing you to store them safely. Store them upside down to keep dust out. TRADITIONAL DESIGN - Our glass cupping jars are traditional to ancient Chinese fire cupping techniques. Discover the ancient art of healing with the Royal Massage Glass Fire Cupping Jar Set. Crafted from medical-grade molded glass, these reusable jars are built with thick, heavy walls for durability and smooth, rounded edges to ensure maximum client comfort. Designed for traditional Chinese fire cupping therapy, these jars help stimulate blood circulation, relieve muscle tension, support detoxification, and promote natural healing. Each jar features a flat top for safe handling and resting after cleaning. To create suction, simply apply heat using a candle, lighter, or burning cotton/alcohol ball before placing the cup on the skin. Perfect for both professional massage therapists and holistic wellness enthusiasts, this set includes a variety of graduated sizes, allowing you to target different areas of the body with precision. The smooth surface makes cleaning easy, while the sturdy build ensures years of reliable use. Set Includes (Outer Diameters): X-Small #1 – 2.25 in Small #2 – 2.5 in Medium #3 – 3 in Large #4 – 3.4 in X-Large #5 – 3.75 in Bring the benefits of this time-tested healing technique into your practice or wellness routine with Royal Massage’s premium fire cupping jars.