Last mile
The cold chain ends at the handoff.
Connect the product, the local node, the route, and the operating math.
A warehouse can hold the product. The last mile has to deliver it, on time, in the required condition, at a cost the operation can support.
coldchainOS does not operate deliveries and has no deployed monitoring, routing or customer integrations. This page is context, an educational calculator, and a description of planned work.
- Documented public evidence
- Illustrative
- Founder-reported
- Planned
What the last mile is
The last mile is where the cold chain meets the customer.
The final delivery leg from a local fulfillment point to the intended recipient. It is not literally one mile. A regional distribution center supplying a local hub is generally middle-mile; the final delivery begins downstream.
Consumer home delivery
Grocery store to household. Local chilled fulfillment hub to household. Specialty pharmacy to patient.
Business-to-business final delivery
Food distributor to a restaurant or school kitchen. Medical distribution point to a clinic.
Click-and-collect
The customer completes the final journey, so the handoff and the trip home still matter.
Cold-chain performance includes staging, loading, transport, unloading, handoff, and any period before the recipient places the product into appropriate storage.
Who it serves
Recipients are not the same as buyers.
| Recipient | Need | Evidence or operating question |
|---|---|---|
| Households and working families | Groceries and chilled or frozen items that arrive in usable condition, at a time that fits the day. | How long does product sit before handoff, and what instructions does the recipient get? |
| Older adults and people with limited mobility | Reliable delivery to the door, without carrying or travelling. | Is the service actually available, and at what cost, to the people who need it? (Not assumed.) |
| Restaurants, hotels and caterers | Predictable receiving windows and product that meets their specifications. | Do receiving hours, dock access and order timing line up with the delivery window? |
| Independent grocers and specialty food stores | Small, frequent replenishment drops without carrying excess inventory. | What does a small drop cost at their order density, and how often do they reorder? |
| Schools and institutional kitchens | Scheduled, documented deliveries to a receiving point. | Who receives, when, and what handling and storage conditions apply on arrival? |
| Patients receiving temperature-sensitive medication | Medication that arrives under the conditions its labeling and procedures require. | What does this specific product require, and what records support the handoff? (A separate operational lane.) |
| Clinics and other authorized healthcare recipients | Authorized receipt with documented conditions. | Who is authorized to receive, and which procedures and rules apply to this product? |
Who buys logistics services
- Retailers
- Distributors
- Food brands
- Meal providers
- Pharmacies
- Healthcare organizations
- Delivery operators
Access is a potential benefit
Better local cold-chain access could help. We make no claim about affordability, equitable coverage or rural reach without evidence about the actual service.
Key product categories
What moves, and what each category asks of the route.
Categories, not a ranking. We do not call any of these “top-selling”, because we have no dataset defining geography, period, channel and metric.
- A
Fresh proteins
Meat, poultry, seafood.
- Product condition on arrival
- Segregation from other items
- Packaging and handling
- Delivery time
- Receiving arrangements
- B
Dairy and chilled foods
Milk, yogurt, cheese where refrigeration is required, chilled beverages.
- Product-specific requirements
- Staging conditions
- Order density
- Replenishment frequency
- C
Produce
Leafy greens, berries, cut produce and others needing appropriate temperature management.
- Temperature and humidity
- Damage in handling
- Compatibility with other items
- Not all produce needs the same conditions
- D
Frozen foods and ice cream
Frozen meals, proteins, vegetables, ice cream.
- Frozen-state requirements
- Packaging performance
- Door openings
- Delivery exposure
- Frozen quality and microbial safety are different issues
- E
Meal kits and prepared chilled meals
Mixed-ingredient orders and ready-to-eat items.
- Mixed ingredients and allergens
- Packaging
- Unattended delivery
- Instructions to recipients
- F
Temperature-sensitive medicines
Insulin and certain biologics or vaccines, where relevant.
- A separate operational lane
- Conditions depend on the product, manufacturer labeling, validated procedures and applicable rules
- No single temperature band applies to all
Enabling equipment categories
- Insulated totes and packaging
- Refrigerants or phase-change materials
- Refrigerated vehicles and compartments
- Local cold rooms and appropriately designed lockers
- Temperature loggers and sensors
- Order, dispatch and routing tools
Categories, not vendor endorsements. Packaging cannot make any route acceptable.
Market velocity, in three parts
Momentum, operations and economics are different things.
A. Market momentum
Is demand growing?
- Growth in sales
- Active customers
- Order frequency
- Delivery use
B. Operating velocity
How fast does the work actually move?
- Orders picked per hour
- Pick complete to dispatch
- Orders per route
- Stops per paid driver hour
- Completed deliveries per route hour
- Miles per completed delivery
- On-time delivery %
- First-attempt completion %
- Dwell in each staging area
C. Economic performance
Does it pay?
- Cost per completed delivery
- Contribution per order
- Refunds, redeliveries, claims
- Packaging and cooling
- Labor and vehicle
- Energy at the local node
- Peak and off-peak utilization
- Dollar sales growth is not the same as physical order growth.
- Order growth is not the same as profitability.
- More drops per hour do not prove proper temperature control.
- High facility occupancy does not establish fast product movement.
Every metric needs a defined denominator and a defined time window.
Current market evidence · as of November 9, 2026
Demand for delivered groceries is growing. That is not our market.
- Documented public evidence Brick Meets Click reported U.S. online grocery sales up 20.7% year over year in 3Q26. Delivery grew more than 30% and drove about three-quarters of the topline increase. [Brick Meets Click]
- Documented public evidence For September 2026 alone, Brick Meets Click reported sales up just over 16%, average order frequency up 9.0%, and sub-same-day orders (within three hours) about two-thirds of Delivery orders. [Brick Meets Click]
- Documented public evidence FDA highlighted best practices for food safety in third-party delivery, including the “last mile”: packaging, temperature control, contamination and allergen control. These are recommendations, not a universal legal requirement. [U.S. Food and Drug Administration]
Read the numbers carefully
The Brick Meets Click figures are survey-based estimates of grocery sales across fulfillment methods and categories, not only refrigerated home delivery. They are not cold-chain logistics revenue, a software market size, or counts of refrigerated shipments. The quarter and the single month are different periods, so their growth rates are not comparable. We use them as context for demand, not as a measure of any one route or facility.
A working example
What does one failed delivery do to the math?
Twenty attempts at $170 of selected costs is $8.50 per completed delivery. Two failures, same costs: about $9.44. Change the inputs and check it.
IllustrativeWhy local real estate matters
The node and the route have to pencil together.
A local node shapes the route. These are the levers:
- Distance to customers
- Route density
- Dispatch windows
- Staging capacity
- Vehicle access
- Loading time
- Refrigeration and electrical requirements
- Labor access
- Rent and operating expenses
The tradeoff
- A closer location may reduce travel while increasing occupancy costs.
- A larger service radius may reach more customers while increasing time and variability.
- A nearer facility is not automatically more profitable.
A hypothetical: Jupiter / Palm Beach
Imagine a small chilled hub serving part of northern Palm Beach County. Whether it pencils depends on facts we do not have: delivery demand, drive times, vehicle access, permitting suitability, utility capacity and rent. We invent none of them. This is a list of questions, not a finding.
Founder-reported Our acquired 8 × 20-foot portable cooler is field-lab hardware for future investigation. It is not an approved food-distribution or pharmaceutical facility.
What coldchainOS contributes
Evidence in. Assumptions visible. Math you can check.
Planned- 1Collect evidence
- 2Identify gaps and conflicting assumptions
- 3Calculate scenarios
- 4Produce a source-linked brief
- 5Support accountable human review
Potential inputs
- Order timestamps
- Dispatch records
- Receiving confirmations
- Route summaries
- Utility bills
- Equipment records
- Product-handling requirements
- Packaging specifications
- Authorized temperature records
Questions it should help answer
- Where does product wait?
- What changes when order density falls?
- What does a failed delivery do to unit economics?
- What evidence supports the claimed operating conditions?
- Does a proposed site improve the combined facility-and-route economics?
Customer addresses, patient information, delivery details and confidential contracts stay out of the public website and public datasets. Demonstrations use synthetic data. See the NDA and data-control approach.
Sources
Where every claim comes from.
Checked on 2026-11-09. The same list is docs/last-mile-sources.json.
U.S. online grocery sales rose 20.7% year over year in 3Q26. Delivery grew more than 30% and drove about three-quarters of the topline increase. Average order frequency among monthly active online grocery shoppers rose nearly 14% in the quarter.
- Source
- Brick Meets Click: U.S. eGrocery Sales for 3Q26 Climb 21% Versus Last Year
- Published
- 2026-10-15
- Data period
- 3Q26 (monthly surveys in July, August and September 2026)
- Geography
- United States
- Measurement
- Survey-based estimates from the Brick Meets Click Grocery Shopper Surveys: adults 18+ who take part in household grocery shopping, adjusted for internet usage, weighted by age and income to Census adult population figures. Delivery means orders from a first- or third-party provider; pickup; and ship-to-home via a common carrier.
- Limitations
- Survey-based grocery-sales estimates across fulfillment methods, not cold-chain logistics revenue, not a software market size, and not a count of refrigerated shipments. The page states no sample size or product-category coverage, and no total dollar amount for the quarter. 'Delivery' includes any grocery delivery, not only refrigerated or frozen items.
- Checked
- 2026-11-09
Monthly U.S. online grocery sales grew just over 16% year over year in September 2026. Average order frequency rose 9.0% year over year, and sub-same-day orders (within three hours of order placement) were about two-thirds of Delivery orders that month.
- Source
- Brick Meets Click: Sept 2026: eGrocery sales up just over 16% year-over-year
- Published
- 2026-10-21
- Data period
- September 2026 (survey fielded Sept 28 to 30, 2026)
- Geography
- United States
- Measurement
- Brick Meets Click Grocery Shopping Survey. Order frequency is a year-over-year change in average orders per monthly active user. Average order value across delivery, pickup and ship-to-home was up 3.6% nominal; Delivery AOV fell 2.5%.
- Limitations
- A single month and a different period from the 3Q26 release, so its growth and order-frequency figures are not comparable to the quarterly ones. No dollar total, sample size or delivery/pickup order mix is given. Same grocery-wide scope as above, not refrigerated-only.
- Checked
- 2026-11-09
FDA, with USDA and CDC, highlighted best practices on food safety for third-party delivery services, covering mitigating measures for vulnerabilities including those that may arise in the 'last mile' of delivery, with topics including packaging, temperature control, contamination control and allergen control.
- Source
- U.S. Food and Drug Administration: FDA Highlights Best Practices on Food Safety for Online Delivery Services
- Published
- 2022-12-09 (content current as of 12/09/2022)
- Data period
- Not a data series
- Geography
- United States
- Measurement
- Guidance announcement (constituent update). It points to a Conference for Food Protection document; we have not read that document and have not verified its formal title.
- Limitations
- The page frames the content as recommendations and best practices, not a legal requirement, and does not list the individual recommendations or specific temperature or time limits. It addresses food, not pharmaceuticals. It is dated 2022; check for newer guidance.
- Checked
- 2026-11-09
Bring a real route. Let’s work the pencil.
Operators, dispatchers, receiving teams and local-hub builders: if you’ve run the last mile, your field notes make the model better.