Which innovative packaging design was recently adopted by the World Wildlife Fund (WWF) for their merchandise that helps reduce plastic waste in oceans?

Sustainable packaging has become a critical focus for companies selling animal and wildlife products, from pet food to conservation merchandise. Companies are finding innovative ways to reduce environmental impact while still effectively protecting and marketing their products. This trivia question tests your knowledge about a groundbreaking packaging design that's making waves in the wildlife conservation retail space.

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Algae-based packaging that dissolves in water and serves as fish food
Cork-lined cardboard made from invasive tree species
Mushroom mycelium containers that biodegrade in 45 days
Bamboo fiber packaging with embedded native plant seeds