Paper cup with a straw

A paper cup with an integral straw formed of a sheet of paper by folding and adhering, comprising:

• a cup body portion, having two lengthwise parallel folding lines and two lateral parallel folding lines defining a bottom portion between said two lateral lines;
• lengthwise adhered portions respectively at each of two opposite sides of said cup body portion, a W-shaped adhered portion respectively at two opposite sides of the bottom portion, and a pair of said lengthwise adhered portions having a semicircular groove with an upper projection extending upward from an upper edge of said cup body portion;
• the bottom portion limited between the two lateral folding lines having a center, a lateral folding line in the center, and a W-shaped folding line respectively at two opposite sides of the bottom portion;
• and,
• a cap portion extending upward from the upper lateral edge of said cup body portion;
• whereby, said lengthwise adhered portions having the semicircular grooves with an upper projection form a straw, said straw having an upper end serving as an outlet and a lower end communicating with an interior of said cup body, said cap portion folded down to close and seal an upper opening of the cup body.