Editor's Note: This article was originally published in 2023. We've updated it for 2025 to reflect the latest products, user feedback, and to explore how aqua bags fit into the biggest workout trends of the year.

Who should get this?

Why use aqua bags?

Hydrocore Bag by Onnit

Fluid X

Tidal Tank

Winner of the Best Aqua Bag

 

I love the feeling of a great strength workout. There's something empowering about lifting weights and challenging your body. But what if you could add a completely new dimension to your training? A way to challenge your balance, fire up your core, and make every rep more engaging, all while being gentler on your body and floors? 

That's where aqua bags com in! This innovative tool uses the unpredictable nature of water to create a fun, dynamic, and incredibly effective workout. 

In this blog, we're going to explore the best aqua bag on the market. I'll explain the options available depending on your needs and fitness level. By the end, you'll know exactly which aqua bag is the perfect fit to add a splash of excitement to your routine. 

Who should get this?

Aqua bag workouts are for everyone, whether you are training at home or the gym. Or if you’re a beginner or seasoned athlete, there is something to be gained by including it into your workout routine. 

It allows a piece of workout equipment with an adjustable weight, is portable, and is safe and friendly to use thanks to its flexible and bouncy nature. It will add a dynamic element to your training.  

Why use aqua bags?

Aqua bags have the very special advantage that in every move, you work on your balance and stability. By working with live weight, the constant motion of the water pushes your body to engage your core and stabilizing muscles. This training can cause reduced injury and better balance in everyday situations. 

So let’s do a breakdown of the best aqua bags on the market.

Hydrocore Bag by Onnit

This aqua bag has a pretty cool shape that, at the moment, is exclusive to Onnit. The Bulgarian Sand Bag inspired them. You can fit it comfortably to do a variety of exercises. As cool as the shape is, it can be very intimidating for beginners, as it’s not so obvious exactly what you can do with it.  So, it’s taking a hit in the race to be the best water filled weight.

Features

• Variety of Shapes: Hydrocore
• Color: Transparent
• Price: from 109 USD

Benefits

• Unique shape and handle

Drawbacks

The Hydrocore doesn't come with a pump, and there aren't any weight indicators on the product. There is a lack of support for users, as they don't provide workouts in an app or any other platform without an additional purchase. In the end, the coolness factor doesn't compensate for shortcomings in their non-user-friendly experience. 

Fluid X

Fluid X has done a great job making their products pop up. They look fun and vibrant; just by looking at them, I want to try them. Attractive and fun products have a greater likelihood of getting used. They are made of highly durable PVC material tested to be 100% leak and burst-proof. The handles are made of double-stitched neoprene, making them comfortable for various exercises. 

Features

• Weight range: 5 kg - 20 kg
• Price: from 52 USD to 78 USD
• Variety of Shapes: Tank(cylinder), Boba (sphere), Cube & DB5
• Color: Transparent

Benefits

• Includes free pump
• YouTube channel packed full of workouts featuring the FX aqua bags
• Fluid X Fitness App available with different programs
• 30-day money-back guarantee
• Maintenance care guide on their website
• Good money for value

Their unique selling point is that they cater to everyone; some of the other offerings on the page are exclusively for athletes, whereas Fluid X wants everyone to gain from training with the aqua bags. In the battle of the best aqua bags, they’re coming on top.

Also, Fluid X is the only product on the list that mentions a sustainability pledge—starting with the packaging, which is a recyclable carton. They strive to create the most durable product for long-lasting reuse to avoid the need for disposal or renewal. Finally, you can mail back the equipment for recycling. 

Drawbacks

Compared to Tidal Tank, their highest weight range falls on the lighter side at 20kg, whereas the competitors go up to 40 kg. However, having used the 20kg range, as a fitness enthusiast, I don’t think I would go any heavier than that, so it’s not necessary. 

 

Tidal Tank

This aqua bag claims to be the “first” of its kind. They are currently available at Amazon. They have a good variety of products, and they include weight indicators in their tank equipment which gives solid points to be the best aqua bag. Tidal Tank boasts that they include free app access with purchase, although there are reported problems with accessing the app. 

Features

• Weight range: 5 kg - 35 kg
• Price: from 55 USD to 92 USD
• Variety of Shapes: Tank & Kettle(cylinder), Sphere 
• Color: Transparent

 

Benefits

• Includes free pump
• In-app video library
• Good variety of sizes
• 1 year warranty

Drawbacks

We report from user reviews that there is a lack of exercise and maintenance instructions. They reported the bag would grow mildew, and they would just throw it out. As well as having some trouble to access their the app and tutorials. 

There is also some feedback regarding the bag's durability, with several incidents regarding tears or air leaks.

2025 Fitness Trends & The Aqua Bag Advantage

Aqua bags aren't just cool; they fit perfectly into the biggest fitness trends of the year.

• Mindful Movement: The focus on being present and controlling your body is huge. The auditory and visual feedback from the sloshing water in a transparent aqua bag (like Fluid X) forces you to slow down and perfect your form.
• Hybrid Training: People are mixing modalities–strength, cardio, and mobility–often in the same session. An aqua bag is the ultimate hybrid tool, allowing you to go from a heavy squat to a dynamic rotational swing seamlessly.
• Low-Impact, High-Intensity: Protecting our joints is a major priority. Aqua bags are inherently low-impact, but the instability factor can make a workout incredibly intense, giving you the best of both worlds.

Winner of the Best Aqua Bag

Keep in mind all the aqua bags that we mentioned above will:

• Be portable
• Have adjustable weight
• Work on your stability and balance

So it's about the details. After all our research, we have to conclude the best aqua bag  goes to Fluid X thanks to the following:

• the support they present to the user
• most easily accessible database of workouts through their YouTube channel, where you can find plenty of workouts for yoga, core, full body, and much more
• Being inclusive of all population

Considering that aqua bags are relatively new, it is important to have support to know which exercises to perform and how to perform them. 

Regarding uniqueness, Onnit’s sandbag shape takes the prize as long as you are familiar with sandbags and know how to use them properly, thus don’t need much support. 

We love that Fluid X has catered to the majority of the public and not just elite athletes by creating options that let us use a lighter weight and they are easy on the eye with those purple handles and the colorful water splashing around, so they get the crown for best aqua bag.