Investors

Chillpack – Smart Technology and a Smart Investment

From Tactical Roots to Dual-Use Potential

One of Chillpack’s strengths lies in the background of its leadership. The founder (and CEO) of Chillpack, Rex Eiserer, combines deep engineering, procurement, and defense-oriented experience. Before launching Chillpack, Rex worked at a major chip manufacturer, responsible for procuring and managing nearly $900 million of direct materials, memory, test equipment, and logistics to support manufacturing and engineering programs.

In addition, Rex served in the U.S. Army, including time at Army Futures Command, where he helped bridge commercial technology and soldier needs, bringing an understanding of real-world field conditions, austere environments, risk capital and soldier-level requirements to the venture. In fact, Chillpack’s idea came from Rex’s time in the Army when he found his air crews hot, tired and combat ineffective, because of their inability to keep the cool, in austere environments. When Rex returned from combat, he went to work on the Chillpack design and its patents.

These competencies — technical/operational rigor, deep procurement and supply-chain experience, plus an understanding of what it takes to win in a harsh environment — give Chillpack a unique edge. Their team understands both “what it takes to build” and “what it takes to deploy” in austere, resource-constrained environments. That makes them unusually well-positioned to deliver cooling solutions that satisfy both defense/tactical clients and civilian dual-use markets.

Two people under blue canopy at campsite
Construction workers in hard hats tying rebar

Validation Through Innovation & Government Backing

Chillpack isn’t just an interesting startup with a good story — it has proven validation. Through the U.S. government’s Small Business Innovation Research (SBIR) program, Chillpack has secured multiple Phase I and Phase II awards, totaling over $1.2 million in developmental funding.

These awards validate the Chillpack thesis: developing ultraportable evaporative coolers to help prevent heat injuries and increase efficiency are winning ideas.

One illustrative example: during a hot summer day in Central Texas, Chillpack’s technology was field-tested with medics at a training site — demonstrating cooling equivalent to full-sized air-conditioning tents but powered by a small 1 kW battery for several hours. This is exactly the type of capability that traditional HVAC or swamp-coolers can’t deliver in remote, resource-constrained settings, and it offers real value for both defense and humanitarian / disaster-relief applications.

A Dual-Use Commercial Strategy with Broad Market Reach

While Chillpack’s roots are deeply tactical and defense-oriented, the company has a clear dual-use commercialization strategy. Their portable coolers have natural appeal beyond military markets: outdoor recreation (camping, tailgates, backyard events), construction and industrial work sites, sporting events, disaster relief shelters, first-responder use, and even everyday consumer uses like backyard comfort or temporary cooling at events.

The market potential is non-trivial. On the one hand, the tactical / military market — for flight-lines, shelters, medical tents, expeditionary camps, and other field operations — represents a well-defined base. On the other hand, the civilian portable cooler market in North America is already a mature, sizable industry (hundreds of millions annually), but largely underserved when it comes to truly portable, single-person-carried units.

By transitioning military-grade cooling systems into consumer-grade products — while preserving the core attributes of portability, efficiency, and ease of use — Chillpack aims to carve out a new sub-segment of the portable cooling market. That gives investors a potential two-pronged payoff: high-margin, defense-contract revenue streams plus a scalable consumer markets responsive to outdoor lifestyle trends and needs.

Two workers cutting tree branches with chainsaw
Two volunteers clearing logs outdoors

Why Chillpack Matters — and What It Signals for Investors

In a world where climate extremes are increasing, and both defense forces and civilian markets are seeking more energy-efficient, flexible, and deployable cooling solutions — Chillpack’s value proposition stands out. Their technical innovation radically reduces size, power demands, and logistical burden; Chillpack’s approach enables cooling in places where no practical cooling existed before.

From a business perspective, the combination of validated technology (via SBIR grants), a leadership team with dual military and commercial credentials, and a clear dual-use strategy makes Chillpack an attractive bet. The risk-reward calculus is compelling: if the company successfully bridges from defense to consumer/industrial markets, it could unlock substantial growth — and potentially disrupt how portable cooling is thought about, for both tactical and everyday needs.

Chillpack represents a convergence of innovation, necessity, and opportunity — delivering “big cooling, small package” solutions that fit the demands of modern defense, work, and outdoor life. For investors and stakeholders, that makes Chillpack more than just another cooler company — but a potential platform for scalable, dual-use thermal technology.

A Mission Born from Real Needs

Chillpack was founded to solve a simple but persistent problem: traditional evaporative coolers — and more so, air conditioning units — offer effective cooling but are often heavy, rigid, power-hungry, and immobile. That makes them impractical for many important settings: austere work sites, expeditionary shelters or field environments, tactical operations, temporary shelters, disaster-response zones, or even consumer outdoor use like tailgates, camping, backyard events, etc. From its inception, Chillpack targeted this unmet need with a big idea: “What if you could get powerful cooling in a package light enough to carry by a single person, set up quickly, and run off modest power?” Their patented designs reduce size and weight significantly — Chillpack can deliver equivalent cooling to a 1.5–3 ton “swamp cooler” (about 18,000–36,000 BTU) while collapsing down for easy transport and using far less power than conventional units. In short: Chillpack didn’t reinvent evaporative cooling — but reimagined it. We’ve made it truly portable, practical, and deployable, and patented those innovations. That reimagining turns a well-known physical principle into a powerful competitive advantage — especially in places where rigid HVAC or large swamp coolers just won’t work.

Executive summary report icon with charts

Milestones and Achievements

  • 2018 — U.S. Patent #1 issued (USPTO Patent: US-10113758-B2/collapsible evaporative cooler). 
  • 2020 — U.S. Patent #2 issued (USPTO Patent: US-10830463-B2 external-water-source evaporative coolers). 
  • 2021 — Awarded Air Force SSTR Phase 1 
  • 2021 — Partnered with Vanderbilt University on Air Force SSTR 
  • 2022 — Awarded Air Force SSTR Phase 2 
  • 2023 — Awarded Air Force SBIR Phase 1 
  • 2023 — U.S. Patent #3 issued (USPTO Patent: US-11604000-B2 multi-air-source + inflatable cooling structures). 
  • 2024 — Awarded Air Force Phase II for novel tactical cooling 
  • 2025 — Awarded Army Phase I for canine cooling 
  • 2025 — Chillpack Incorporated in Delaware 
  • 2025 — Partnered with University of Pennsylvania on Canine Application 
  • 2024 — Non-provisional patent submitted for evaporative coolers that do not use media for cooling 
  • 2025 — Non-provisional patent submitted for dual mode evaporative coolers with direct body cooling capability. 
  • 2025— Provisional patent submitted for canine cooling capability 
  • 2025 — Partnered with Leonid Capital for Convertible Note for TACFI submission 
Winding path between two flags
Certificate with ribbon seal icon

Our Patents

Raekor technology difference: 

Protected by three US patents, with four more pending.

We’re the only evaporative coolers made with lightweight materials that, when not in use, collapse into a smaller form factor for easy handling.

  • US-10113758-B2: Published 2018-10-30; Covers any evaporative cooler that changes shape into a smaller form factor for transport and storage.
  • US-10830463-B2: Published 2020-11-10; Covers evaporative coolers without water reservoirs; allows for external water sources.
  • US-11604000-B2: Published 2023-03-14; Covers multiple air sources for cooling and inflatable structures.

Pending US and International patents

  • Non-provisional patent submitted for evaporative coolers that do not use media for cooling. First USPTO office action completed May 2025.
  • Non-provisional patent submitted for coolers that use control systems to regulate output temperature, airflow, & humidity.
  • Provisional patent submitted for dual-mode cooler that can convert into a body cooling unit (ChillPack+).
  • Provisional patent in development for novel canine kennel. (new potential market).