(metal) cap / clasp / mouthpiece / socket (for light, etc.)

to open / to make (a hole)

to broaden; to become wide / to develop; to progress; to improve / (of a person) to be enlightened; to be inspired; (perfect tense) to be sharp or clever

硬い: keeping its physical shape or appearance under a force: stiff / 固い: keeping its shape or behaviour even under other influences: hard, firm

bottle / (specifically) bottle of alcohol

hard; to harden / to set; to solidify

hard / tight / strong; firm / strict / inflexible

plastic bottle

to keep one's own bottle of liquor or other alcoholic beverage at a bar

a bottle cage, a cage for holding a water bottle on the frame of a bicycle