San Diego Padres Drink Coaster Set Petco Park MLB Authenticated On-Field DirtSan Diego Padres coaster set containing four porcelain Padres drink coasters, each containing a capsule of MLB authenticated dirt from Petro Park that can be verified by its numbered hologram at MLB. com. COA also provided by Steiner. Display stand also included Coasters are all approximately 4 in diameter Excellent condition; three coasters show no visible handling wear, one shows some very light soiling on the surface. Display stand shows little to