MineAssets/1.12.2/assets/minecraft/recipes/glass_bottle.json

{
  "type": "crafting_shaped",
  "pattern": [
    "# #",
    " # "
  ],
  "key": {
    "#": {
      "item": "minecraft:glass"
    }
  },
  "result": {
    "item": "minecraft:glass_bottle",
    "count": 3
  }
}