Abstract: The coaster tray comprising a base tray and the movable coaster units, functioning in two way: In one way, it is an integral tray for a complete arrangement of a coffee or tea set with pots and cups; in the other way, the coaster units can be detached from the base tray and served individually for individual pots or cups; the coaster units, while grouping together, having tongue joint devices at sides, sliding into the grooves at the inner edge of the bracing bar of the base tray, being locked at edges of the base tray by edge locks; for individual serving, removing edge lock, sliding each coaster units out of the groove of the base tray; the design features of each coaster unit, such as shapes, colors, etc., being parts of the base tray as a whole.