"The hammer was made from local and renewable materials. Fairly sustainable~."

"Good to know, all designers should pack it in then, China has it covered! ;)"

"If the spacer was connected to the lid, and it had a flat on the bottom it would facilitate the ice removal. "

"I think it could have worked if the outer was silicone and the shape tuned. But also made me think maybe an auger system could be interesting. Twist to release the ice. The above sketch would rely on the the user only filling to half way, but building on this idea...  if divisions were put in the silicone outer dividing it into quarters along the length (the auger running through tight gaps), this would also force the individual pieces (quarter circles) to drive out. The lid would need to be separate from the auger drive in this case. Not really sure this is going to benefit the world though. "