I made the cocktail glass in my own way. You can see how I did it on my YouTube.
Step 1: Roll Up
I used rattan strips to make a bowl & a foot part by "kentai" technique and a wood dowel to make a stem part with using an electric drill and sandpapers.
Step 2: Form
I made two coils for the bowl & foot part and then formed with pushing and sliding by hand.
Step 3: Apply Urushi
I applied urushi in order to harden the parts.
Step 4: Use an Electric Drill
I made a stem part and smoothed the other parts with using the electric drill and sandpapers.
Step 5: Urushi
I attached all the parts with rice glue-urushi and finished with urushi.
Step 6: Complete
Now enjoy to drink!