Note that you can use a "real" table name in tempdb; that is, a table name that does not begin with # or ##. The table will then remain until you drop it or tempdb is recreated.
You could also have a process that periodically dropped any non-temp table in tempdb that was created more than 120 minutes ago.
SQL DBA,SQL Server MVP(07, 08, 09) "It's a dog-eat-dog world, and I'm wearing Milk-Bone underwear." "Norm", on "Cheers". Also from "Cheers", from "Carla": "You need to know 3 things about Tortelli men: Tortelli men draw women like flies; Tortelli men treat women like flies; Tortelli men's brains are in their flies".