"blue top" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "blue",
        "3": "top"
      },
      "expansion": "blue + top",
      "name": "compound"
    }
  ],
  "etymology_text": "From blue + top, from the conventional colour of milk bottle caps.",
  "forms": [
    {
      "form": "blue tops",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "blue top (countable and uncountable, plural blue tops)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "British English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "word": "green top"
        },
        {
          "word": "gold top"
        },
        {
          "word": "red top"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              90,
              99
            ]
          ],
          "ref": "2013 November 20, Katharine Ann Angel, Froggitt Chain, eBook Partnership, →ISBN:",
          "text": "The large man delivers expertly, easily remembering the quantities for each doorstep: two blue tops, one green, fresh orange juice or half a dozen eggs.",
          "type": "quotation"
        },
        {
          "bold_text_offsets": [
            [
              82,
              90
            ]
          ],
          "ref": "2015 September 28, Jennifer Bernard, Lumps and Bumps Part Two: Three Wishes, Booktango, →ISBN:",
          "text": "Thankfully she is drinking plenty so we have swapped our usual green top milk for blue top to try and increase her calorie intake.",
          "type": "quotation"
        },
        {
          "bold_text_offsets": [
            [
              94,
              102
            ]
          ],
          "ref": "2021 August 27, Ronald Turnbull, The Book of the Bivvy: Tips, stories and route ideas, Cicerone Press Limited, →ISBN:",
          "text": "So, for luxury, some of that water was combined with added protein and sugars in the shape of blue-top milk for the morning muesli.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "whole milk or a bottle thereof."
      ],
      "id": "en-blue_top-en-noun-FIFElo-c",
      "links": [
        [
          "whole milk",
          "whole milk"
        ],
        [
          "bottle",
          "bottle"
        ]
      ],
      "raw_glosses": [
        "(UK) whole milk or a bottle thereof."
      ],
      "synonyms": [
        {
          "word": "silver top"
        },
        {
          "word": "whole milk"
        },
        {
          "word": "full-fat milk"
        }
      ],
      "tags": [
        "UK",
        "countable",
        "uncountable"
      ]
    }
  ],
  "word": "blue top"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "blue",
        "3": "top"
      },
      "expansion": "blue + top",
      "name": "compound"
    }
  ],
  "etymology_text": "From blue + top, from the conventional colour of milk bottle caps.",
  "forms": [
    {
      "form": "blue tops",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "blue top (countable and uncountable, plural blue tops)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "British English",
        "English compound terms",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "English uncountable nouns",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "coordinate_terms": [
        {
          "word": "green top"
        },
        {
          "word": "gold top"
        },
        {
          "word": "red top"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              90,
              99
            ]
          ],
          "ref": "2013 November 20, Katharine Ann Angel, Froggitt Chain, eBook Partnership, →ISBN:",
          "text": "The large man delivers expertly, easily remembering the quantities for each doorstep: two blue tops, one green, fresh orange juice or half a dozen eggs.",
          "type": "quotation"
        },
        {
          "bold_text_offsets": [
            [
              82,
              90
            ]
          ],
          "ref": "2015 September 28, Jennifer Bernard, Lumps and Bumps Part Two: Three Wishes, Booktango, →ISBN:",
          "text": "Thankfully she is drinking plenty so we have swapped our usual green top milk for blue top to try and increase her calorie intake.",
          "type": "quotation"
        },
        {
          "bold_text_offsets": [
            [
              94,
              102
            ]
          ],
          "ref": "2021 August 27, Ronald Turnbull, The Book of the Bivvy: Tips, stories and route ideas, Cicerone Press Limited, →ISBN:",
          "text": "So, for luxury, some of that water was combined with added protein and sugars in the shape of blue-top milk for the morning muesli.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "whole milk or a bottle thereof."
      ],
      "links": [
        [
          "whole milk",
          "whole milk"
        ],
        [
          "bottle",
          "bottle"
        ]
      ],
      "raw_glosses": [
        "(UK) whole milk or a bottle thereof."
      ],
      "synonyms": [
        {
          "word": "silver top"
        },
        {
          "word": "whole milk"
        },
        {
          "word": "full-fat milk"
        }
      ],
      "tags": [
        "UK",
        "countable",
        "uncountable"
      ]
    }
  ],
  "word": "blue top"
}