There are several Murano companies that did the tutti-frutti pieces. AVeM, Fratelli Toso, Ferro, and JI Co. come to mind right away. There are also some "generic" tutti-frutti pieces, meaning people who are looking at them aren't sure who made them. The label on your bowl is generic, so doesn't provide a lot of information. I can't see the backs well enough to tell much about your bowls. Many of the tutti-frutti pieces made by the various companies are distinctive in their colors, shapes, or filigrana. Your bowls do look like Murano glass to me and, as Ivo said, could be AVeM.