Celebrities endorsing products (or making their own!) is nothing new. Ryan Reynolds – Gin Sammy Hagar – Tequila Taylor Swift – Diet Coke Beyonce – Pepsi George Foreman – George Foreman Grill David Beckham – Adidas Now, it’s singer/songwriter/rocker Lenny Kravitz’s turn. He’s partnered with an oral wellness brand called Twice which has a line…