Passionately Handcrafted in San Diego

Each Kooru Cold Plunge Tub is built by hand using sustainably and ethically sourced redwood — arriving completely set up and ready to use. Simple to maintain, it plugs into a standard 110V outlet and requires no complex installation. Let this beautiful tub remove all barriers to the mental and physical benefits that cold water immersion has waiting for you.

Every tub is customized with premier craftsmanship for the discerning buyer. From hand-selecting every board to carefully firing and sanding each one in the Japanese tradition of Shou Sugi Ban — a venerable method used to protect wood for centuries — the result is an unmatched depth of color and exposed grain that highlights the beauty of contrast. Just as good stress makes you stronger, cold water is a hormetic stressor on the body.

Features

Shou Sugi Ban Burning

An ancient Japanese technique that preserves wood by charring the surface with a hot flame. Far from degrading the wood, Shou Sugi Ban enhances durability and beautifies the grain — delivering a stunning finish for both modern and rustic settings.

Adjustable Temperature Control

Simple and easy to use, the programmable chiller lets you dial in your ideal plunge temperature. Maintenance and servicing are straightforward and hassle-free.

Natural Ozone Water Purification

Ozone (O3) is a potent oxidant that breaks down contaminants and microorganisms without chemicals or harmful byproducts. Research shows it's the most effective and sustainable water treatment method available — keeping your plunge clean, safe, and eco-friendly.