Use a tray to catch the small spills
A tray earns its space by making pouring, resting a wet filter and clearing the table easier.

Follow the drips
You lift a basket from a mug, carry a pot to the table and set down a wet spoon. Those small movements explain why a tray can be useful even when tea is made in a very ordinary way. It gives drips somewhere to land and keeps the pieces together. Before buying one, arrange your usual cup, pot and filter rest on the table. Leave room to grasp the handles without nudging another vessel. That arrangement tells you more about a useful size than a photograph of an elaborate tea set. A tray that is crowded from the start will make pouring less comfortable, not more orderly.
A serving tray and a draining tray do different jobs
A flat serving tray carries objects and catches modest spills within its rim. A draining tea tray has openings through which water enters a reservoir or a drainage system. Do not assume that a decorative wooden tray can take repeated pours of hot water just because it is pictured with teaware. Check its intended use, finish and care instructions. For a cup and infuser, a washable filter rest on a simple tray may be enough. If you choose a draining model, consider how you will empty and clean it. The hidden space below the surface is part of the equipment, not a place where yesterday's water can be forgotten.
Make clearing up part of the choice
Try lifting the tray while it is empty, then consider the added weight of a filled pot and cups. A raised rim is not necessarily a secure handle. Carry only what you can manage steadily, and keep hot drinks away from the edge. After use, empty collected liquid, wipe or wash the tray as its maker advises, and let every part dry. A removable insert is helpful only if you can take it out without spilling the reservoir. You may discover that the best arrangement is two small pieces: a light serving tray and a separate washable dish beside the kettle. The point is to simplify the movements you already make, not to create a larger cleaning task for the sake of a more formal tea table.