A: Vocal problems, like polyps, are not restricted to singers. While singers require peak performance of their voice, other voice professionals, such as teachers, lawyers, clergy, salespeople and receptionists, are also at higher risk for many vocal cord problems.
The permissible operating temperature range of nitrile rubber is â40 to +100 Â°C (â40 to +210 Â°F). For brief periods, temperatures of up to 120 Â°C (250 Â°F) can be tolerated. SKF also offers a special nitrile rubber compound with a temperature range between â55 and +110 Â°C (â65 and +230 Â°F).
By comparison, the rubber koozie was at 50 degrees and the control was already up to 63.2 degrees. That's 11.5 degrees and 24.7 degrees warmer than the Yeti, respectively. And no, the Colster didn't sweat at all (though neither did the regular koozie). By the end of the two hours the results were even more dramatic.