The garland bowl shown in the first image is, in my opinion, one of the finest example of Roman glass preserved for us today. Dating to the reign of Augustus in the first century, it has by some miracle remained essentially intact, except for a small chip to the rim and some weathering on the exterior. It is made up of four separate slices of translucent glass: blue, yellow, purple, and colourless. As you can see, each segment was then decorated with a small strip of millefiori glass which depict a garland hanging from an opaque white cord. It is extremely rare indeed that large sections of glass from antiquity were made up of different coloured glass. As the MET notes: it is also the only example that combines the technique with millefiori decoration. As such it represents the peak of the glass worker’s skill at producing cast vessels.
The two-handled bottle second shown is early Imperial, dating to the 1st century AD. The jug in the shape of a bunch of grapes is late Imperial, dating to about the 3rd century AD.