The small clear blue leaf shaped trinket or bon bon is by artist Mats Jonasson, for Maleras Glasbruk, Sweden. Its realistic impression of a leaf with frost on its edge has a smooth inside, leaf outside. The three raised main ribs are the feet for the 4.5" L  x 3.38"W bowl. Produced in the 1970's, the bowl has no chips, cracks or breaks. It has the Mats Jonasson sticker. Made in Sweden.