Heathrow Scientific Corrugated PP Cryogenic Freezer Box for Microtubes | Waterproof, Flat-Pack

Cardboard cryoboxes soak through after a few freeze-thaw cycles, and rigid plastic boxes can't ship flat. Heathrow Scientific Corrugated Polypropylene Cryogenic Freezer Boxes split the difference: moisture-proof polypropylene sheets folded into a sturdy box that arrives flat-packed for space-efficient shipping and storage, then pops into shape in seconds with pre-assembled dividers already fitted inside. Rated to −80 °C, these waterproof boxes eliminate the mold, softening, and structural collapse that plagues cardboard in high-humidity freezer environments. Available for 0.2 mL, 0.5 mL, and 1.5/2.0 mL microtubes, the corrugated PP line covers the three most common sub-milliliter tube formats in a single product family.

Features and Benefits

• Corrugated Polypropylene Construction: 100% waterproof and mold-resistant — eliminates the degradation that destroys cardboard boxes after repeated freeze-thaw cycling in humid freezer environments.

• Flat-Pack Shipping: Ships and stores flat, saving shelf space until needed. Pops into box shape in seconds with no tools or adhesives required.

• Pre-Assembled Dividers Included: Each box ships with dividers already fitted, eliminating the separate divider purchase and assembly step required by cardboard cryoboxes.

• Rated to −80 °C: Polypropylene maintains structural integrity and flexibility in ultra-low temperature mechanical freezers without embrittlement.

• Multiple Tube Sizes: 0.2 mL (144-place), 0.5 mL (81-place), and 1.5/2.0 mL (81-place) configurations cover the most common microtube formats in molecular biology and clinical labs.

• Sustainable Alternative: Durable enough to reuse many times over, reducing the volume of single-use cardboard boxes sent to waste — a tangible sustainability win for environmentally conscious labs.

Specifications

Laboratory Applications

• Replacing cardboard cryoboxes in labs experiencing mold growth, box softening, or structural failure from high-humidity freezer conditions

• High-throughput PCR and genomics labs archiving large volumes of 0.2 mL tubes that need dense, moisture-proof freezer storage

• Sustainability-focused institutions transitioning from single-use cardboard to reusable polypropylene without the cost of rigid molded plastic boxes

• Remote or field labs where flat-pack shipping reduces freight volume and boxes must withstand rough handling during transport

Frequently Asked Questions

How do corrugated PP boxes compare to standard polypropylene cryoboxes?
Corrugated PP boxes ship flat and cost less per unit than rigid molded PP boxes, but they are not autoclavable and have a slightly less rigid feel. They excel as a reusable, waterproof alternative to cardboard at a mid-range price point.

Are these boxes autoclavable?
No. Corrugated polypropylene is rated to −80 °C but is not designed for autoclave temperatures (121 °C). For autoclavable options, see the Heathrow polypropylene (PP) molded tube storage boxes.

Do the 1.5/2 mL boxes fit standard freezer racks?
Yes. The ~5.2 × 5.1-inch footprint fits all standard upright and chest freezer racks designed for 2-inch (50 mm) cryoboxes.

How many times can I reuse a corrugated PP box?
With careful handling, these boxes typically survive 10–20+ freeze-thaw cycles before the fold lines weaken. Replace when the box no longer holds its shape firmly.

Quality Assurance

Heathrow Scientific corrugated polypropylene cryogenic boxes are manufactured from moisture-proof, mold-resistant material and inspected for fold-line integrity, divider fit, and dimensional consistency before shipment.

Academic and Institutional Pricing

LabSupplies.com offers tiered quantity pricing for academic and research institutions. As an authorized dealer, we ship directly from USA inventory.