Product line stretching and brand extension involve introducing new products under an established brand name in order to leverage brand recognition and equity. This allows companies to expand their product ranges from higher to lower end offerings. Examples show both successful extensions, like Danone milk products and Baltika Beer adding various types, and failures when new products did not meet consumer expectations, such as Crystal Pepsi and McDonald's Arch Deluxe hamburger. Effective brand extension grows brand awareness while ineffective ones can damage the brand's reputation.