empty air / meaninglessness / (Buddhism) sunyata: emptiness, vacuity, awareness, openness, thusness / (Buddhism) void: one of the 五大 (godai, literally “great five”) and the highest of the five elements

bottle / (specifically) bottle of alcohol

natural gas / gas / a dense thick fog

the sky

something empty / ineffectual / false

by heart, from memory, by rote

empty; vain; sky

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