The world's first rigid food container with a truly flush exterior profile — eliminating lips, maximizing cube efficiency, and transforming supply chain economics.
Conventional flanges and lips waste cubic space, reduce pallet density, and cost the industry billions annually in excess freight.
Internal sealing lands, corner-based retention, near-vertical sidewalls, and integrated stacking features create a flush outer profile.
Full freight modeling, FTL/LTL/parcel analysis, and pallet optimization across hundreds of case-size configurations.
For decades, thermoformed clamshell containers have featured outwardly extending flanges and lips — a design legacy that quietly destroys supply chain efficiency at enormous scale.
Every protruding lip adds ≈0.25" per side — that's dead volume inside every case, pallet, and shipping container. At scale of millions of units, this compounds into massive losses.
Traditional designs fit only 540 units per standard 48×40 pallet. The same annual volume requires 33% more pallet positions, 33% more trucks, and 33% more freight cost.
External flanges snag on adjacent containers, case walls, and automated packing equipment — increasing downtime, damage rates, and manual handling requirements.
Flanges require additional plastic — adding material cost and weight per container, multiplied across millions of units annually.
By moving all sealing and retention features to the interior, we achieve a truly flush outer wall — maximizing every dimension for product, not wasted structure.
FlushPack™ integrates four discrete mechanical innovations into a single thermoformable rigid container — each addressing a specific failure mode of conventional designs.
An internal circumferential ledge replaces the external flange entirely. The sealing surface is formed inside the sidewall envelope — supporting film seals and lid engagement while maintaining a flush exterior face.
Guideposts at the lid corners engage complementary guide holes in the base for precise alignment and frictional snap-fit retention — no continuous peripheral bead required. The lid skirt stays within the base sidewall plane.
Draft angles of 90–92° (1–2° taper) maintain a consistent footprint from top to bottom — eliminating the pyramid-shaped dead space created by high-draft conventional containers, and enabling reduced clearances in all packaging configurations.
A protruding region on the lid top cooperates with a recessed region on the base bottom to create interlocking stacked columns. These features allow dense, stable case packing without shifting or requiring foam inserts.
Designed specifically for thermoforming compatibility with produce, leafy greens, sprouts, and microgreens. The internal land supports optional film or membrane sealing for tamper evidence — keeping all features within the outer envelope.
The flush exterior eliminates snag points on case packing and palletizing equipment. Consistent outer dimensions with no protruding features allow tighter tolerances in automated filling, sealing, and packing lines.
Comprehensive freight modeling across FTL, LTL, and parcel shipping modes. Every figure validated against real carrier rates across multiple shipping lanes.
Analysis of 100+ case size and orientation combinations across current and optimized container footprints.
| Container | Unit L×W | Case L×W | Units/Case | Layer Util % | Units/Pallet | Rank |
|---|---|---|---|---|---|---|
| Current Spec | 7.25×5.25" | 16×10" | 12 | 71.4% | 576 | #1 |
| Optimized A | 7.00×5.00" | 14×10" | 16 | 100% | 768 | #1 |
| Optimized A | 7.00×5.00" | 14×10" | 12 | 100% | 720 | #3 |
| Optimized C | 6.00×4.50" | 12×10" | 16 | 90.0% | 1,024 | #1 ★ |
| Optimized C | 6.00×4.50" | 18×12" | 32 | 100% | 1,024 | #2 ★ |
FlushPack™ is built on a foundational provisional patent application covering the complete container architecture — from internal sealing geometry to corner-based retention systems.
Initial engineering insight: eliminating external flanges while maintaining seal integrity via internal land geometry.
Full 3D modeling in NX 2027. Comprehensive pallet optimization study across 100+ case configurations. Shipping savings model built and validated.
Provisional application 10439/004001 filed covering full container architecture including sealing system, lid retention, stacking features, and sidewall geometry.
Utility patent filing, prototype tooling development, and licensing discussions with food packaging manufacturers and retailers.
FlushPack™ originated from a simple observation: packaging design has been trapped by convention. The outward flange — inherited from early thermoforming practices — persists not because it's optimal, but because it's familiar. We set out to challenge that.
By combining deep engineering analysis with rigorous supply chain modeling, we designed a container that maximizes every cubic inch — from the thermoforming mold to the retail shelf. The result is a patent-pending design that delivers measurable, auditable savings from day one.
Our approach: validate first, then commercialize. Every claim in this application is backed by freight models, CAD data, and pallet optimization studies across hundreds of configurations.
Pradeep brings deep expertise in packaging engineering, industrial design, and supply chain optimization. The FlushPack™ concept was developed through systematic analysis of the limitations of conventional thermoformed container designs, with a focus on eliminating structural features that impede logistical efficiency without adding functional value.
With hands-on experience in NX CAD, STEP data, and freight economics, Pradeep developed the complete design and business case entirely in-house — from 3D modeling to pallet optimization to patent drafting.
We believe every cubic millimeter of a shipping container should work. FlushPack™ is our proof: that rigorous engineering, combined with supply chain intelligence, can unlock value that has been hiding in plain sight for decades.
Whether you're a food packaging manufacturer, retailer, investor, or licensing partner — we want to hear from you.
Pradeep Saha
Inventor — FlushPack™ Technology
Reference docket number 10439/004001 in all IP-related correspondence.
→ Thermoforming manufacturers ready to prototype
→ Fresh produce brands seeking logistics efficiency
→ Retailers with sustainability and cost mandates
→ Investors in packaging IP and supply chain tech
→ Strategic licensing partners
A mutual NDA is available for prospective partners who require detailed technical disclosures beyond what is publicly filed.
The US fresh produce packaging market exceeds $5B annually. A 33% improvement in pallet density translates to hundreds of millions in system-wide logistics savings for even mid-scale producers. FlushPack™ addresses this with a single, patentable design change.