(TrendHunter.com) Shark Week is back again for another year and Sonic is celebrating with the release of a new Shark Week Slush at participating locations. Just as the name suggests, the new Shark Week Slush is... (TrendHunter.com) Shark Week is back again for another year and Sonic is celebrating with the release of a new Shark Week Slush at participating locations. Just as the name suggests, the new Shark Week Slush is...