The tray is used for containing wine bottles or wine bottle caps and is provided with a containing cavity with an upper opening, and a plurality of upper opening limiting grooves used for limiting the wine bottles or the wine bottle caps are formed in the inner bottom of the containing cavity; a plurality of vertically-upward jacking columns located between the upper opening limiting grooves are installed at the inner bottom of the tray, an upper limiting part and a lower limiting part which facilitate vertical stacking of the trays are arranged on an upper protection plate and a lower surrounding plate of the tray correspondingly, and positioning between the two trays is achieved. The stack is formed by stacking a plurality of trays, and production of a full-automatic high-speed packaging production line is facilitated. The tray and the stack are provided and used for placing the wine bottles or the wine bottle caps, long-distance transportation of the wine bottles or the wine bottle caps from a packing material factory to a winery and internal dump of a company are achieved, the whole stack is disassembled by matching with an intelligent robot on a production line, and therefore intelligent and high-speed production is achieved.