You dont because there levels keep coming like that.
you dont get the drink you keep it for fingerprints i beat that spy quest
the chef will need a person to be the a trainee so when bistro wants a refill
Jump up!!
fingerprint
you have to get past the Bad gugs
Use the thumbprint from the glass in the BAD Bistro.
Go to the Bistro. Get the job as a chef by passing the memory game. Once you have the chef hat, get the wine glass from the BAD agent (it has his fingerprint). Sneak out through the vents in the kitchen and across the light fixtures. When you reach the locked door in the BAD Control Center, unlock it using the fingerprint on the glass. (Click the lock when it appears.) (see related question)
You have to rescue the three spies, and collect the fingerprint from the Bistro. Then you can enter the satellite control center to the right of Toupee Terrace. (see related solution)
beat the mission "saint marks bistro"
You dont fill it up its got evidence on it you have to get out with it with out them seeing you!
go to the bad bistro apply for the job get the glass from the guys in the table the finger print will be on the glass
so they can see you if your the chef if your not then I'm not sure:)