<recipetype:create:filling>.addJSONRecipe("fiery_glass",{
  "type": "create:filling",
  "ingredients": [
    {
      "item": "minecraft:glass"
    },
    {
      "fluid": "tconstruct:blazing_blood",
      "nbt": {},
      "amount": 1000
    }
  ],
  "results": [
    {
      "item": "druidcraft:fiery_glass"
    }
  ]
}
);
