Colostrum Storage Bags: Calf & Breast Milk Freezing Guide

For any large-scale dairy operation, the first few hours after calving set the course of a calf's life. The animal must take in enough colostrum with high antibody activity inside that narrow window; healthy growth and future productivity depend on it. Older practice relied on disposable plastic bottles or ordinary food-grade bags to collect and freeze colostrum — containers that leaked, invited cross-contamination, and wasted precious colostrum as the contents expanded at low temperatures. Purpose-built upright colostrum collection bags with reinforced sealing strips are now gaining wider acceptance across the global livestock industry.

From Plastic Bottles to Dedicated Upright Colostrum Bags

• Farm practice: operations such as Animal Natural Health show that pre-storing double-sealed, sterile, upright bags in a -20°C freezer keeps colostrum usable for the long haul.
• Capacity range: these colostrum bags are offered in capacities from 1 to 4 liters to suit different collection volumes.
• Storage life: immunoglobulin levels remain stable across a storage period of up to one year.
• Feeding: when gradually warmed in a warm water bath before feeding, the colostrum stays free from bacterial contamination and retains its nutritional value.
• Market data: according to a report published by Market Intelligence, the global colostrum collection bag market was valued at $145 million in 2024 and is projected to reach $298 million by 2033, growing at a compound annual growth rate of 8.4%.
• Adoption: the products are increasingly becoming standard consumables in large calf-rearing farms and veterinary clinics.

Material and Structure: Cold Resistance, Burst Protection, Leak Prevention

In terms of design, colostrum collection bags are typically made of food-grade low-density polyethylene or multi-layer polyolefins and are free of harmful additives such as bisphenol A. A tear-resistant bottom structure paired with reinforced edge sealing ensures complete prevention of bursting and leakage during freezing and expansion — the decisive difference between a dedicated upright bag and an ordinary food bag.

Internationally, organizations and animal welfare groups are also intensifying educational campaigns on colostrum collection and management, prompting more dairy farm workers to adopt specialized storage tools.

Standards and Specifications: Raising the Quality Bar

• T/CI 622-2024, "Requirements for the Collection, Storage, and Transportation of Human Breast Milk", sets out requirements across collection, storage and transport.
• The group standard "Testing Specifications for Burst and Leak Resistance of Breast Milk Storage Bags", approved by the China-Europe Economic and Technical Cooperation Association in July 2025, further standardizes burst and leak resistance, sealing performance and low-temperature resistance for containers used to collect human breast milk and colostrum.
• Together these documents indirectly push the quality standards for animal colostrum storage tools to a higher level, giving buyers clearer criteria when selecting products.

Breast Milk Colostrum Bags: Rapid Growth in Infant Care

In the field of infant care, the use of colostrum storage bags is also experiencing rapid growth.

• Within 72 hours of giving birth, a new mother may collect just a few milliliters of the first "golden colostrum" through manual expression or a breast pump.
• Specialized, miniature-sized disposable colostrum collection bags can be tightly sealed and refrigerated, letting mothers preserve this extremely scarce, highly nutritious liquid for when breastfeeding is difficult or the baby is temporarily away.
• Data projections indicate that the global colostrum market is expected to expand from $3.4 billion in 2024 to approximately $6.1 billion by 2034.

From dairy farmers rushing from pasture to maternity clinic, to parents in a delivery room handing over their first bag of colostrum, every layer of this seemingly simple storage bag adds certainty to the health and safety of life. KODY PACK manufactures and customizes spout pouches, bag-in-box (BIB) systems, stand-up pouches with taps, colostrum bags, liquid packaging bags and laminated roll film for food, personal care and liquid packaging customers — contact our team for samples and a quotation.