Contrast Cube: Funding Rounds, Investors & Leadership

About Contrast Cube

Contrast Cube is building a home device for hot, cold and contrast therapy. Contrast therapy means alternating between heat and cold for several minutes at a time. Hot or cold water circulates to a flexible therapy pad worn on the body. The device switches between the two in under 30 seconds, automatically, on a timer and at the temperature the user sets. It is meant for people recovering from an injury or surgery, people who train hard and anyone with sore muscles.

Contrast Cube is based in Sun Valley, Idaho, and gives a contact address in La Grange, Illinois. Zachary Manta, a former science teacher, is the founder. The product is still in development, and the company plans a consumer launch in spring or summer 2027. It has built two prototypes. Version 1.0 is dated January 2, 2026, and version 2.1 is dated April 13, 2026. People can reserve a unit for free, with no deposit. Herbst Produkt is the design and engineering partner.

Funding Rounds (SEC Form D)

First sale	Filed with SEC	Amount sold	Investors	Avg. check	Terms	Filing
Oct 13, 2026	Oct 27, 2026	$310,000of $1.0M target	5	$62,000	EquityRule 506(b)	Form D ↗

First sale is the date the first investor in the offering committed to invest. Companies must file Form D within 15 days of that date, so filing dates run later.

Why Investors Backed Contrast Cube

Contrast Cube is building a home device for hot, cold and contrast therapy. Contrast Cube's case is that there is a gap between $15 ice packs and heating pads and clinical systems that cost $5,000 or more. Its founder, a former middle school science teacher, built the first prototype in his garage. The product is still in development, and Contrast Cube does not name its investors or customers.

The problem it targets

Contrast Cube's case is that home users have two poor choices. It puts ice packs and heating pads at $15 and clinical systems at $5,000 or more. "Contrast therapy works, but the equipment has always been hopelessly inconvenient or hospital-priced," it writes on its home page. Founder Zachary Manta got the idea after an injury, when he asked whether to use ice or heat. His research pointed to a single device that could offer cold, contrast and heat for every phase of recovery. No such product was on the market.

What the product does

Hot or cold water circulates to a flexible therapy pad worn on the body. Contrast therapy means alternating between heat and cold for several minutes at a time. The device switches between the two in under 30 seconds. It lists cold at 35 to 50 degrees Fahrenheit and hot at 90 to 105 degrees. To use it, a person plugs it in, adds a reusable chill pack and fills two water tanks from the tap. One fill lasts up to two hours. The device is a general wellness product, not a medical device.

We wrote this summary from public statements by Contrast Cube and its investors. It is not investment advice.