Check the listing for details. Fire Cup Glass Jars. Condition: New. Listed at 8.99 USD. Fire Cup Glass Jars CAI Industries Corp. CAI Industries Corp. FIRECUP Thick, heavy-walled glass cups for use with traditional Chinese fire cupping techniques Heat or fire is customarily used to produce a vacuum Set includes small, medium,ÊlargeÊand X-large Size: Small (1.5"), Medium (1.9"), Large (2.1"), and X-Large (2.6") Fire Cup Glass Jars Thick, heavy-walled glass cups for use with traditional Chinese fire cupping techniques. Heat or fire is customarily used to produce a vacuum. Set includes small, medium, large and X-large. Quantity: Each or Set Size: Small (1.5"), Medium(1.9"), Large (2.1"), and X-Large (2.6") Manufacturer: CAI Industries Corp. Options: Small (FIRECUP.1S) Medium (FIRECUP.2M) Large (FIRECUP.3L) X-Large (FIRECUP.4X) Set - Small, Medium, & Large (FIRECUP.3L/.2M/.1S)