. An easily usable bottle cap comprising:
a cap base having a chamber in an upper portion and a connect member in a lower portion, said chamber having a sucking tube base, said connect member having a connect tube in an interior, said sucking tube base provided with a water outlet, said chamber having a slot in a bottom, said slot having a hole in its bottom, said chamber having two vertical ridges formed on an front wall, said cap base having two hollows formed in two opposite sides, said two hollows opening to outer sides, said hollows respectively having a horizontal projecting post on an inner wall, said hollows respectively having a slide groove formed in an upper end and a notch formed in inner walls of two opposite sides, said cap base having an opening in an outer periphery defining said chamber, said opening having two side walls provided respectively with a pivotal ear bored with a shaft hole, a pivot provided to extend in said shaft hole, said connect member having female threads formed in an inner wall, and an anti-leak gasket provided to be fitted in said connected member;
an upper cap pivotally connected with said cap base and having a hook respectively formed at two opposite inner side walls, said hooks respectively having a sloped face on a lower edge, said upper cap further having a press plate extending down from an inner wall and a pivotal ear formed in a side, said pivotal ear having a shaft hole;
two press buttons positioned respectively in said two hollows of said cap base and having a bar in an interior, a coil spring provided to have one end fitted around said bar, said press buttons further having respectively a stop formed respectively on two opposite side walls and an engage block formed on top, said stops having a sloped face on an upper edge;
a flexible sucking tube fitted on said sucking tube base in said chamber and made of a flexible material;
a straw connected with said connect tube of said connect member; and,
said connect member of said cap base made to engage with an upper end of a bottle, said press buttons pressed manually to move inward in case of drinking through said bottle cap, said coil springs compressed to let said engage blocks disengage from said hooks of said upper cap, said upper cap swung up by resilience recovery of said flexible sucking tube, said flexible sucking tube automatically becoming tilted straight for a user to suck liquid contained in the bottle through said straw and said sucking tube.