Magemono is a word used to describe items made of bent wood. The most common such item is the magemono kensui that’s used in the Irekodate temae.
There are other temaes that call for the use of magemono items. These items are incredible expensive compared to their ceramic or metal counterparts.
Before using a magemono item it should be soaked in water throughout. This will make the wood swell and eventually make the item watertight.