If you’re searching for the best coconut water at Costco, you’re in the right place. Whether you’re a fan of Harmless Harvest’s refreshing flavor or looking to stock up on Kirkland’s affordable organic option, Costco has something for every kind of coconut water drinker.

As someone who reaches for coconut water daily, I created this guide to help you compare the top brands available at Costco in 2025—so you can make the best choice for your taste, budget, and lifestyle.

Why Buy Coconut Water at Costco

It’s helpful to understand how a Costco buyer approaches product selection. They follow the principle of ‘right package, right price, right place,’ ensuring that their coconut water offerings deliver maximum value at the best available quality. Costco emphasizes bulk value over brand variety, and that philosophy is reflected in stores and online.

Shelf-Stable Coconut Water Brands

Kirkland Signature Organic Coconut Water

This is Costco’s star player. Behind Vita Coco, Kirkland is the second largest coconut water brand in the US. It’s offered in large multipacks (12-count 330ml and 9-count 1L Tetra Paks) with USDA Organic, No Sugar Added, Not From Concentrate, 100% Juice, and Kosher certification.

Vita Coco Shelf Stable Coconut Water

The national leader in coconut water. Vita Coco is sold in 18-count 11.1oz and 12-count 16.9oz Tetra Paks (Business Delivery only). To stay in Costco’s limited lineup, it must deliver high velocity sales, which it does well.

Real Coco Shelf Stable Coconut Water

Real Coco appears regionally and seasonally, reflecting Costco’s “treasure hunt” strategy. It comes in 12-count 16.9oz or 6-count 33.8oz packs. It’s attractively packaged and sourced from Vietnam.

C2O Shelf Stable Coconut Water

Packaged in aluminum cans (17.5oz 15-pack), C2O has a light, crisp flavor and strong eco-friendly appeal. It’s not always available but fits the ‘treasure hunt’ model. It’s a product of Thailand.

Refrigerated Organic Coconut Water Brands

Harmless Harvest Organic Coconut Water

This super-premium refrigerated brand is minimally processed and inspired by the Thai Nam Hom varietal. Sold in 6-pack 14oz bottles, Harmless Harvest is a cult favorite.

Kirkland Signature Refrigerated Organic Coconut Water

Also sourced from Thailand and inspired by Nom Hom coconuts, this 6-pack of 14oz bottles offers a fresh, nutty taste at a more affordable price point. A great alternative to Harmless if you’re budget-conscious.

Costco Coconut Water Brand Comparison

Frequently Asked Questions

·       Is coconut water cheaper at Costco?

Yes, Costco typically offers the lowest price per ounce due to bulk packaging and private label efficiencies.

·       Does Costco carry Harmless Harvest year-round?

In most locations, yes. But availability can vary based on region and season.

·       Which Costco coconut water is the healthiest?

Harmless Harvest and Kirkland’s Refrigerated are minimally processed and closest to fresh coconut water.

·       Is Kirkland coconut water the same as Vita Coco?

No. They are separate brands with different production methods and flavor profiles.

Final Thoughts: Which Coconut Water Should You Buy?

I think they’re all great! For regular coconut water drinkers looking for the best deal, Costco is hard to beat. Kirkland Signature delivers exceptional value, while Harmless Harvest and Vita Coco appeal to brand loyalists. Costco’s buying power gives members access to consistent quality and unbeatable pricing—just another reason why it’s my go-to place to stock up.