Direct drinking cup for self-rescue in emergency situations and daily use and use method

The invention discloses a direct drinking cup for self-rescue in emergency situations and daily use and a use method. The direct drinking cup is composed of a cup cover, a plug cock, a purification cup, a water cup, a primary filtering layer, an activated carbon column, a fine filtering layer, a water sucking opening and a cup handle. The purification cup is fixed to the top of a cup body through threaded connection. The top of the purification cup is covered with the cup cover. The plug cock is plugged into the top of the purification cup. The primary filtering layer is composed of PP cotton and a metal wire mesh bag. The activated carbon column is located between the primary filtering layer and the fine filtering layer. The fine filtering layer is composed of a reverse osmosis membrane or a nanofiltration membrane and a metal wire mesh bag. The water sucking opening is located at the position 20-40 mm away from the top of the water cup. The cup handle is located in the middle of the water cup. The direct dr