<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Yes, but in most cases it was only the camera[person] and us viewers that saw the "Diesel" marking on the inside of the lid. That was likely well anticipated by the producers, as a way to add a bit more challenge to the land-only [well, sea too] treck this week.</font>
Well, that's what the contestants get for not reading the script.