A roof top cooler (10) is provided with perforate side walls (11), a top panel or lid (12), and a bottom panel which comprises a sump (13), and the sump (13) has four upstanding bosses (15) adjacent the four comers of the cooler (10). Hollow spacer posts (18) are carried by the bosses (15) and extend...http://www.google.es/patents/US6047935?utm_source=gb-gplus-sharePatente US6047935 - Cooler support
