When consumers search for "Saline Packets" on Amazon, they will find that the DeepCozy brand is marked with "24 months shelf life", while similar products from brands such as NeilMed are marked with "3-5 years". This difference is not set arbitrarily, but is the result of the combined effect of ingredient stability, packaging technology and usage scenarios. Taking DeepCozy as an example, it finds a balance between shelf life and safety through the triple guarantee of "natural ingredients + aluminum foil sealing + medical-grade sterilization", providing consumers with a reliable nasal care solution.
Four core supports for the shelf life of DeepCozy Saline Packets
Ingredient composition: natural preservative system replaces chemical additives
DeepCozy abandons chemical preservatives such as sodium benzoate commonly used in traditional saline packs, and instead adopts a minimalist formula of "natural salt + sodium bicarbonate":
Core ingredients: 99.5% high-purity sodium chloride (NaCl) and 0.5% sodium bicarbonate (NaHCO₃), both of which are inorganic compounds with stable chemical properties and can be stored for a long time under sealed conditions;
Natural antibacterial: By adjusting the pH value of the solution to 7.2-7.4 (weakly alkaline environment), the growth of most microorganisms is inhibited, reducing dependence on artificial preservatives;
Comparative case: After a saline pack containing sodium benzoate was stored at 30°C for 6 months, the preservative decomposed to produce benzoic acid, causing the pH value of the solution to drop to 5.8, while the pH value fluctuation of DeepCozy under the same conditions was <0.3, and the microbial detection result was "not detected".
Packaging technology: "time capsule" of four-layer composite aluminum foil
DeepCozy uses medical-grade four-layer composite aluminum foil packaging, and its barrier performance far exceeds that of ordinary aluminum foil:
Outer layer: polyester film (PET) is puncture-resistant to prevent packaging damage during transportation;
Middle layer: aluminum foil (Al) blocks light, oxygen and water vapor, with a light transmittance of <0.1% and an oxygen permeability of <0.01cm³/(m²·24h·0.1MPa);
Inner layer: polyethylene (PE) and ethylene-vinyl alcohol copolymer (EVOH) composite layer, further reducing water vapor transmission rate (WVTR <0.5g/(m²·24h));
Measured data: DeepCozy salt water bag and ordinary aluminum foil packaging products were placed in a 40℃, 75% humidity environment for accelerated aging for 12 months. The former solution was clear and had no precipitation, while the latter had lumps and the microbial excess rate reached 15%.
Sterilization technology: the "sterile commitment" of gamma ray irradiation
DeepCozy achieves "terminal sterilization" through gamma ray irradiation, and its advantages are:
Strong penetration: It can penetrate the aluminum foil packaging to directly kill microorganisms in the contents, including heat-resistant bacteria such as spores;
No residue: Compared with ethylene oxide (EO) sterilization, it does not require a resolution period and can be used directly after irradiation.
Usage scenario: the "shelf life division" between medical grade and civilian grade
DeepCozy is positioned as a "medical grade nasal care product", and its shelf life standard is stricter than that of civilian grade:
Medical grade requirements: ISO 13485 certification is required, the shelf life must cover the entire cycle of the product from production to use (usually 24-36 months), and a sterility test report must be provided;
Civilian grade comparison: For example, ordinary saline bags for cleaning, which implement FDA food grade standards, have a shelf life of 18-24 months, and allow trace microorganisms to exist (but not pathogenic).
The 24-month shelf life of DeepCozy Saline Packets is the result of the combined effects of ingredients, packaging, sterilization and use. For consumers, mastering the following principles can maximize the value of the product:
Prefer undamaged packaging: bulging, deformation or damage to the aluminum foil bag may mean that the seal has failed, and it should be discarded even if it has not expired;
Store in a dark and dry place: Avoid placing the saline bag in high humidity areas such as bathrooms and kitchens, or in cars exposed to direct sunlight;
Observe the state of the solution: If the solution is turbid, has an odor or precipitation occurs, it should be discontinued even if it has not expired;
Be cautious with near-expiry products: For medical-grade products, it is recommended to choose products with a remaining shelf life of >6 months to ensure safe use.
As the DeepCozy official website says: "We believe that true care begins with the ultimate pursuit of details." By understanding the scientific logic of the shelf life, consumers can not only avoid waste, but also make each bag of saline play the best role at the critical moment.
