Belgian designer Maarten De Ceulaer has devised a very unique process for making the beautiful bowls you see below, using a couple balloons and plaster (in addition to colored pigments and a clear, waterproof glaze).
Here’s how he describes his process on his website:
“The Balloon Bowls are created by casting strong synthetic plaster into a balloon, after which a second balloon is inserted, and inflated. These two balloons act as flexible moulds, ensuring a unique shape for each and every bowl. Once the plaster is set, the balloons are removed, and a bowl appears.”