GUSTA SUPPLIES Plastic Rectangular Mold with Round Bottom for Jelly, Wagashi, Candies - Perfect for Baking, Dessert Making & Asian Confectionery

The plastic boats in various shapes is a type of yokan jelly mold (羊羹舟).  They are typically used to create jelly type wagashi "Nagashi-gashi" (流菓子) that takes on the shape of the mold.

Wagashi -- traditional Japanese sweets -- capture seasonality and imagery of nature in their aesthetics.  They are served before the bowl of matcha that concludes even the most elaborate kaiseki meal.  The specialty wagashi tools Gusta sources are from reputable makers in Japan.  They exhibit the craftsmanship that is respected also in wagashi making.