This bowl was made by sticking tiny slices of FIMO millefiori canes on a metal bowl. It was baked and then removed from the bowl, giving it a nice, shiny inner surface.
This is a polymer clay (FIMO) mat, to be put under your glass to protect the table. Additionally, when backlit with a lamp, it makes nice visual effect, as it is made of semi-transparent FIMO.
It is made using the millefiori technique, which is a descendant of the glass millefiori, used for many centuries with glass (most fameous – Venetian glass).
Big, round glass bowl covered with pink and blue millefiori canes slices.
Most probably will be used as part of a lamp.
An IKEA bowl covered with earthtone millefiori canes.
Edit: Added another photo.