"Parfait cup" found at 100-yen shop Daiso. A disposable plastic cup exclusively for parfaits.
The shape that the mouth spreads upward is the parfait cup itself that is sold for takeout at cafes and the like. It comes with a dome-shaped lid with a hole for inserting a straw or spoon. 4 pieces per product.
It's a parfait that seems to be completed if you just add the ingredients as you like, but when you try to make it, it's surprisingly deep. For example, when I tried to make a cereal layer on the top to avoid "cereal that became messy at the bottom", spoons and straws did not stick.
A parfait cup where you can enjoy the depth of your parfait while enjoying your own work. Why don't you try collecting your favorite foods and seasonal ingredients?