Open a crafting table
Place 3 glass blocks in a V shape
Put 1 glass block in the left column, middle row
Put 1 glass block in the right column, middle row
Put 1 glass block in the middle column, bottom row
Take the glass bottle from the result slot
Open a crafting table
Place 3 glass blocks in a V shape
Put 1 glass block in the left column, middle row
Put 1 glass block in the right column, middle row
Put 1 glass block in the middle column, bottom row
Take the glass bottle from the result slot