what are some of the main uses of the Rocks/Old-fashioned.

1. Crushing ice: Rocks glasses are commonly used for crushing ice for cocktails such as Old Fashioneds and whiskey sours.

2. Serving spirits neat or on the rocks: Rocks glasses are the perfect vessel for serving spirits like whiskey, rum, or tequila neat or on the rocks.

3. Cocktails: Rocks glasses are commonly used for serving cocktails such as Old Fashioneds, Negronis, and Manhattans.

4. Layering drinks: Rocks glasses are ideal for layering drinks that require a specific order of ingredients.

5. Muddling: Rocks glasses are often used for muddling herbs, fruits, or sugar cubes to release their flavors in cocktails.

6. Garnishing: Rocks glasses are often used for adding garnishes such as citrus twists, cherries, or herbs to cocktails.

7. Presentation: Rocks glasses are often used for serving drinks in a visually appealing way, with garnishes and ice cubes arranged carefully.

Overall, Rocks glasses are versatile vessels that can be used for a wide variety of drinks and serve as a classic and stylish addition to any home bar.