Objects transported with Courier (formerly Uber Flash) must follow the requirements below:
The user agrees that he will only send items which can be transported in a vehicle without refrigeration and for the necessary time for the displacement between the delivery’s pick-up and destination.
Maximum allowed weight varies by market and vehicle type. Consult the Terms and Conditions to see the specifics for your market.
Consult the link below for prohibited items to have more clarity on requirements for Uber Courier: