While everyone from David Attenborough to the Queen of England are working on ridding the world of plastic containers, others are working on sustainable replacements. Take this UK-based startup for example: They have created small pouches that encase a serving of water in a thin membrane made from brown algae. The seaweed used for the casing can be grown extremely fast, and the creators of the pouches claim you can eat it once you’re done drinking the water.