Edible water bottle could put an end to plastic packaging. The water ball, named "Ooho!" is a biodegradable and natural membrane which can be fully swallowed and digested, as well as hydrating people in the same way as drinking water. The product is made from a seaweed extract and is tasteless, although flavors can be added to it. The material is cheaper than producing a plastic water bottle. To create the balls, a block of ice is dipped in a solution of calcium chloride and brown algae, and the membrane forms around it. A layer can be peeled off to keep the exterior clean for consumption. Great. Hope it will replace the millions of plastic bottles thrown away every year. Reference Skipping Rocks Lab --- https://www.youtube.com/watch?v=KppS7LRbybw
Additional coating will increase the final cost of the product, which is expected to be very cheap, but is quite possible. A similar to the "brazing" technology could be applied, which will spray fine lipid or Chitosan powder into the OH gas flame, which will coat the gelatin fiber's surface with a fine hydrophobic film, together, or after the main 3D-printing process. Various else technologies could be tested as well, accordingly.