Adjustable Water-Filled Weights

A refillable water-filled weight that works like a kettlebell or dumbbell. Fill it with tap water to the weight you want, and empty it when you're done.

Each weight adjusts from 1 to 11 lb (0.5–5 kg), and a set of 2 gives you up to 22 lb combined. Empty, each weighs just 0.8 lb (about 360 g).

Each weight measures 12.3 in long, 4.7 in wide and 13.7 in tall (31.2 × 12 × 34.7 cm), or roughly 12.5 × 5 × 14 in. It's slim enough for a closet shelf or a backpack.

Open the lid, fill it at any tap to the line for the weight you want, and close the lid firmly so it seals. When you're done, pour the water out. No tools, plates or pins.

Fill lines in both lb and kg are molded into the jug, so they won't wear off. Each line shows the total weight, including the 0.8 lb jug, and the slightly translucent body lets you see the water level as you fill.

No. The plug-seal cap locks watertight and the plastic is thick and durable. Reviewers consistently report zero leaks.

Very. It's made from high-density polyethylene (HDPE), the same kind of tough plastic used for toolboxes and motor-oil bottles, chosen for its impact strength and resistance to cracking. It also stays tough in the cold rather than turning brittle. Just empty it before leaving it somewhere below freezing, since water expands as it freezes.

Yes. Weight is weight: 5 lb of water loads your muscles exactly like 5 lb of cast iron. The difference is that water moves, which adds a stability challenge metal weights don't have.

The top handle and two side handles give you multiple grip options. Hold it one-handed like a kettlebell, or grip both sides for crunches, squats and Pilates. That means more exercises than a single-grip weight allows.

Each handle is 1 in (2.5 cm) in diameter, about the same as a standard dumbbell handle. The smooth plastic is easy to wrap your fingers around, with no knurled metal to rub your palms.

Yes, and that's a good thing. As the water shifts, your muscles work to keep the weight steady, which adds core engagement and focus to every move. Customers say it helps them concentrate and control their form. Slow, controlled movements work best.

You can work your whole body: arms, chest, back, abs, glutes and legs. Examples include squats, lunges, weighted crunches, hip thrusts, swings, lateral raises and Pilates. The free interactive exercise library at cards.aguaforce.com shows how to do each one, sorted into upper body, core and lower body sections with the target muscles highlighted.

Go to cards.aguaforce.com on your phone, tablet or computer. Use it right in your browser, or use the install option on the site to add it to your home screen like a regular app. No app store needed.

Every set comes with 2. Use one for kettlebell-style moves like swings, goblet squats and weighted crunches, or both for dumbbell-style moves like curls, presses and lateral raises. You can also set each to a different weight, for example a heavier one for squats and a lighter one for shoulder raises, so you're not refilling between exercises.

For $39 USD you get 2 weights that each cover 1–11 lb, far less than buying several kettlebells or dumbbells, and they take up a fraction of the space. AguaForce tops out at 11 lb per weight, so it's designed for toning, strength building and everyday fitness rather than heavy lifting.

Yes, it's BPA-free. It's made from HDPE (high-density polyethylene), the same type of plastic used for milk jugs, which isn't made with BPA. The resin meets FDA requirements for plastics that come into contact with food (21 CFR 177.1520), confirmed by the manufacturer and by independent lab testing.

It comes in aqua color.

$39 USD for a set of 2. Online, AguaForce is sold in sets, so you get 2 adjustable weights that each go from 1 to 11 lb.

Online at aguaforce.com, where a set of 2 is $39 with free shipping to the US and Canada, and on Amazon. Studios, gyms, pools and retailers can buy any quantity through the wholesale program, and pools and aquatic facilities can request a free demo set.

Yes. Returns are free on online orders, for one set per order. If you order two sets, one of them can be returned free of charge.

AguaForce comes with a 30-day money-back guarantee. If it breaks within 30 days, you get your money back.

No. AguaForce is built for home workouts, including on days when rain or a busy schedule keeps you from the gym.

Most customers empty it after each workout for lighter, easier storage, and many pour the water on their plants.

Empty it after each workout and let it air-dry with the lid off before storing. Wipe the handles with a damp cloth as needed, and between users if you share weights in a class. Refill with fresh tap water each session.

For fast or swinging moves, keep your hands dry or wear workout gloves to maintain a secure grip.

Within the 1–11 lb range, yes. Instead of buying and storing several fixed weights (2, 3, 5, 8, 10 lb), you simply change the water level.

Easily. Empty it, pack it (it weighs under 1 lb) and refill it wherever you land. Customers use theirs in second homes, RVs and at the beach.

The CDC recommends muscle-strengthening activity on at least 2 days a week, working all the major muscle groups: legs, hips, back, abdomen, chest, shoulders and arms. Adults 65 and older should add balance activities too. Two or three sessions a week is a good start for most beginners, with a rest day between strength workouts. Consistency matters more than intensity.

No. AguaForce tops out at 11 lb per weight, which is ideal for toning, building strength and everyday fitness. Building bulk takes much heavier loads and a very different training plan.

Yes. It has no sharp edges, no rust, and weighs under 1 lb when empty.

Yes. Aquatic instructors use it in both shallow-water and deep-water aqua aerobics classes.

Foam aquatic dumbbells only give resistance in the water: they float, so pushing them under works your muscles, but on land they weigh almost nothing. AguaForce does both. Use it empty underwater, where buoyancy and drag provide the resistance, or fill it with water for moves above the water and for workouts on land.