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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 ---

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.

Why 3D-Printing ?
If you want to make some shape out of Gelatin or Chitosan, you'll need to solve them in hot water and stir up to receiving a dense solution, then pour that mass into a mold and wait for some hours the shape to get cool and hard.
You'll probably have some defects on the product's surface, after take it out of the mold. It will not be perfect.
Obviously, this is not so technological solution, so our idea is to first produce FIBERS out of the gelatin and the chitosan, and then to firmly pin-point melt and WELD these fibers to each other, by ultra-clean OH Gas flame, precisely adjusted as flame temperature and moisture, in a part of a second, in layers - each over other, building any crazy kind of robust, yet precise, attractive, mirror-shine and colorful shape (even impossible to be made by other mode), plus delicious, with great tastes, in the Edible option.
Fiber mode allows various images to be "embroidered" in, or on the product's body, thus making it an excellent displays for full-color, smooth or relief, commercial labels, logos, etc.
Heating will be instantly applied by a 2-3mm micro-flame in a tiny point, and will cool down fast, so the overall product will need no time wasted for cooling. It'll be ready for use in seconds after it has been produced.
All the summary time, needed for producing the fibers and the final product, will be times shorter than any other kind of standard technology for producing such kind of goods.