Which of the following food packaging innovations was the first commercially successful edible packaging to reach mainstream grocery stores in the US?

Packaging waste is one of the biggest environmental challenges facing the food industry today. While many companies focus on recyclable or biodegradable solutions, some innovative brands have taken sustainability to the next level by developing packaging you can actually eat! Test your knowledge about this fascinating development in food packaging technology that's changing how we think about product delivery and waste reduction.

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Ooho water bubbles (spherical edible membranes made from seaweed extract)
WikiPearl (yogurt with an edible skin made from food particles, developed by Harvard professor David Edwards)
Bakeys edible cutlery (spoons made from rice, wheat and sorghum flours)
Tomorrow Machine's oil package (caramelized sugar coated with beeswax)