Mariposa Whale Bottle Opener. What a cute bottle opener. 5.5ö Long. All Mariposa metal is handmade sand cast recycled aluminum. They are a company dedicated to creating elegant and environmentally responsible products. Always handwash your Mariposa products in warm sudsy water. Never put Mariposa in the Dishwasher or the Microwave. Warm to 325 degrees for serving hot foods. Freeze or chill for summer entertaining.