+ 
Packaging 6 tubes of silicone with one caulk gun appears as basic to me as a hamburger with a roll but for some reason it appears this idea was only stuck in my head. It probably would be about the same price as a standard case of caulk but still save the contractor time and money in their job as looking for tools would be right in the box. The caulk gun would not be Remington quality (metaphor) but simple something to get the job done. Silicone +Caulk Gun together it will probably come out but remember where you read it first.