It is also unclear who the manufacturer is for this product. Biguerlai Tea is also known as Biguerlai Slimming Tea. This is a weight loss tea product from the Philippines. This product can be purchased from several online websites, none of which appear to be a dedicated website for Biguerlai Tea. Biguerlai Tea is a weight loss tea that works more like a colon cleanser than a weight loss supplement to produce significant weight loss.