Specimen Collection Containers: Types, Uses, and How to Choose

Choosing the wrong specimen container is one of the most common — and most preventable — causes of rejected lab samples. An incorrect additive alters blood chemistry results. A non-sterile container introduces contaminating organisms into a urine culture. A container without preservative degrades a 24-hour urine sample before it reaches the lab.

This guide covers every major type of specimen collection container, what each is used for, how to choose between sterile and non-sterile options, and a practical selection table for the most common test types.

Types of Specimen Collection Containers

Urine Collection Containers

The most common specimen container in clinical settings. Used for urinalysis (UA), urine culture, drug screening, and 24-hour protein or creatinine collection.

Standard urine cup (30–60 mL): Wide-mouth, screw-cap, leak-proof. Used for routine UA and dipstick testing. Sterile versions required for culture.

Urine culture cup (sterile): Same form factor but manufactured and packaged to maintain sterility. The sterile container ensures that any organisms cultured from the sample are from the patient — not introduced during collection or handling.

24-hour urine container (2–3 L): Large volume container with a wide mouth and secure lid. Some include a preservative (boric acid, thymol, or hydrochloric acid) to stabilize analytes over the collection period. The preservative used must match the specific panel being ordered — confirm with the laboratory before dispensing.

Urine transfer tube: A smaller tube used to transfer urine from a collection cup to an analyzer or for aliquoting. Reduces contamination risk compared to open-cup transfer.

Key specs to verify: sterility (required for culture), preservative type (must match test), volume, and leak-proof seal rating.

Blood Collection Tubes (Vacutainer Tubes)

Color-coded tubes with specific additives matched to the test being ordered. The color of the cap indicates what additive — if any — is inside the tube.

Critical rule for coagulation tubes (blue top): The ratio of blood to sodium citrate must be exactly 9:1. An underfilled blue-top tube produces falsely prolonged clotting times. Always fill to the indicated line.

Draw order matters: When collecting multiple tubes, follow the correct order of draw to prevent additive carryover between tubes: blood cultures → light blue → red/gold → green → purple → gray.

Urine Specimen Kits

Pre-assembled kits for point-of-care or patient self-collection. Typically include a sterile collection cup, a transfer device or pipette, and a labeled transport tube. Reduces handling steps and contamination risk compared to assembling components separately.

Used in: outpatient clinics, physician offices, urgent care, occupational health (drug screening programs).

Swab Collection Kits

A sterile swab paired with a transport tube containing liquid or gel transport media. The media preserves bacterial, viral, or fungal organisms from the time of collection until the sample is processed in the lab.

Types by transport media:

Swab material matters: Nylon flocked swabs release more cells than cotton or rayon swabs — important for viral and molecular testing where cell yield directly affects sensitivity. Avoid calcium alginate swabs for viral or PCR testing — they inhibit many PCR reactions.

Tissue and Biopsy Containers

Sterile, wide-mouth containers used to transport surgical specimens and biopsies to pathology.

Formalin-filled containers: 10% neutral buffered formalin (NBF) is the standard fixative for histopathology. Formalin cross-links proteins and stops autolysis, preserving tissue architecture for H&E staining and IHC. The volume of formalin should be at least 10× the volume of the specimen.

Dry sterile containers (no fixative): Used when the specimen will be sent for microbiology culture, frozen section, or molecular testing. Formalin destroys nucleic acids and prevents culture — never add formalin to a specimen intended for culture or molecular analysis.

Cryogenic vials: For specimens requiring long-term storage at –80°C or in liquid nitrogen. Used in biobanking, cell culture, and molecular studies. Must be rated for cryogenic temperatures — standard plastic containers will crack.

Stool Collection Containers

Wide-mouth, screw-cap containers with or without preservative, depending on the test.

Never mix preservatives. An O&P test requiring formalin will be invalid if submitted in a Cary-Blair container. Confirm the exact container required with the reference lab before collection.

Cerebrospinal Fluid (CSF) Tubes

Sterile, numbered polypropylene tubes (typically 1–4) collected sequentially during lumbar puncture. Tube numbering is critical — different tubes are sent to different lab sections:

• Tube 1: Chemistry (protein, glucose)
• Tube 2: Microbiology (culture, Gram stain)
• Tube 3: Hematology (cell count, differential)
• Tube 4: Additional studies (cytology, special tests)

The first tube may contain blood from needle trauma — this is why microbiology and cell count tubes are collected later. Never reverse the order.

Sterile vs Non-Sterile Containers: When Each Is Required

General rule: Any test that grows, identifies, or quantifies living organisms requires a sterile container. Any test measuring a chemical or physical property of the specimen can use non-sterile, provided there is no gross contamination risk.

Plastic vs Glass: Which Material for Which Application

For most clinical specimen collection, plastic (polypropylene) is the standard — it’s lightweight, shatter-resistant, and meets sterility requirements when manufactured appropriately. Glass is used primarily in histopathology (formalin-fixed tissue) and in specialized chemical analyses where plastic ion leaching could interfere with results.

Specimen Container Selection Table

Labeling Requirements: What Every Container Must Show

A specimen without complete, legible labeling is a rejected specimen. Most labs will not process an unlabeled or mislabeled sample — and rightfully so, as a mislabeled specimen that does get processed poses direct patient safety risk.

Minimum required label information:

• Patient full name
• Date of birth
• Patient ID / medical record number
• Date and time of collection
• Collector initials
• Specimen type and source
• Test ordered (if not on requisition)

Practical tips:

• Label the container, not the lid. Lids can be swapped; the container stays with the sample.
• For blood tubes, label immediately after drawing — never pre-label tubes before collection.
• Use waterproof labels or printed barcoded labels. Handwritten labels on wet containers fade or smear.
• Amber bags or opaque secondary containers are required for light-sensitive specimens.

Transport and Storage: Keeping Specimens Viable

Common Specimen Collection Mistakes and How to Avoid Them

Related Products at BostonMed Supply

• Specimen containers — urine collection — sterile and non-sterile, multiple volumes
• Transfer pipettes — for urine and fluid aliquoting without contamination
• Test tubes — for sample transport and secondary container use
• Centrifuge tubes — for specimen processing and storage
• Sharps containers — for safe disposal of needles used in blood collection

Browse the full specimen collection catalog or contact us for bulk pricing on orders over $500.

FAQ: Specimen Collection Containers