After several years of declining sales, BeautiControl, a Dallas-based direct marketer of cosmetics, announced today that it plans to merge with Tupperware. A sale price was not reported. BeautiControl did not say if the move would lead to layoffs. According to a statement by BeautiControl, the move will enable the company to extend its North American and global business reach by leveraging Tupperware’s multinational infrastructure and 50 years of direct-selling expertise. BeautiControl fou...