Water · Gear Review
Fill it before pressure drops, not after. The WaterBOB turns your bathtub into an 80-to-100-gallon sealed water reserve in about 20 minutes. It is single-use, and that is the only real limitation.
The verdict
Both bathtub bladders on the market work. The bigger variable is whether you deploy one before pressure drops. A bladder in the closet and a plan to fill it at the first storm warning is worth more than which brand you pick.
Best overall
The original bathtub bladder. Food-grade BPA-free plastic, sealed fill sock that attaches to any standard faucet, included siphon pump for dispensing, and up to 100 gallons of capacity depending on tub size. Rated for 16 weeks of fresh water storage. Over 500,000 units sold. The longer track record, more user feedback, and included pump give it the edge.
$35 – $60 depending on seller
Also works — Made in USA
Made in the USA from LLDPE food-grade plastic. Holds 65 to 100 gallons depending on tub dimensions. Available in bag and box packaging. Some versions include a siphon pump; others require purchasing one separately. Fewer user reviews but a solid product from a small US manufacturer.
$25 – $40 depending on version
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Before you buy
A bathtub bladder is not instant storage. It requires 15 to 30 minutes of active water pressure to fill. That means it works for hurricanes with 24-to-48-hour forecasts, approaching winter storms, boil-water advisories, and any situation where you know trouble is coming. It does not help with a sudden pipe burst or earthquake. Pair it with pre-filled containers (jugs, barrels, WaterBricks) for the no-warning scenarios.
The WaterBOB and AquaPodKit are both designed for one deployment. Once drained, the bladder material is not rated for a second fill cycle. This is not a defect; it is a deliberate design decision that keeps the cost low and the seal reliable for the one time you need it. Buy a replacement after each use. At $35 to $60 per unit, the cost-per-gallon of stored water is among the lowest of any method.
A filled bladder occupies the entire tub. You cannot bathe, and the tub is unavailable for the duration. In a one-bathroom household, this is a real tradeoff. The standard approach: fill the bladder in the primary tub for drinking and cooking water, and keep the second tub (or a utility sink) free for hygiene. If you have only one tub, the 100 gallons of drinking water is usually the higher priority.
Water sitting in an open bathtub collects dust, soap residue, pet hair, and anything else in the air. It becomes unsuitable for drinking within days. The sealed bladder keeps water contained, protected from contamination, and accessible only through the pump. The difference between clean drinking water and a bathtub full of questionable water is the liner.
The picks
Best overall
The WaterBOB is the original bathtub bladder and remains the category leader. The design is simple: a heavy-duty food-grade plastic liner with a sealed fill sock that threads onto any standard bathtub faucet. Fill time is approximately 20 minutes depending on water pressure. The included siphon pump lets you dispense water into pitchers, jugs, or pots without tilting or scooping.
The manufacturer rates the sealed bladder for up to 16 weeks of fresh water storage. In practice, municipal tap water stored in a sealed liner at room temperature stays drinkable for 8 to 12 weeks without additional treatment. The bladder is BPA-free and meets USFDA food-grade guidelines. It ships flat in a box roughly the size of a board game, stores in a closet or under a bed, and weighs under 3 pounds.
The WaterBOB has been on the market since the mid-2000s, holds U.S. patents, and has been used by over 500,000 households. That track record matters. There are enough real-world deployment reports from hurricanes in Florida, Texas, and the Gulf Coast to confirm that the product works as designed when deployed in time.
At a glance
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Also works — Made in USA
The AquaPodKit is a US-manufactured alternative made from 4-mil LLDPE food-grade plastic. It fits most standard bathtubs and holds 65 to 100 gallons depending on tub dimensions. The manufacturer recommends filling to 65 gallons in a standard tub to stay safely below the tub rim.
The main difference from the WaterBOB: the AquaPodKit uses a different liner construction and may or may not include a siphon pump depending on the version purchased. The base model (Bag version) does not include a pump; the upgraded version with filter and pump costs more. Check the listing carefully before ordering.
The AquaPodKit is from a small US business, and the domestic manufacturing is a genuine point of differentiation. If Made in USA sourcing matters to you, this is the straightforward choice. The product works. It has fewer total reviews than the WaterBOB, but the reviews it does have are consistently positive.
At a glance
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Deployment guide
Step 1
Rinse the tub briefly to remove loose debris. The bladder sits on the tub floor, so clear any bath toys, soap dishes, or non-slip mats. A quick rinse is sufficient; the water goes inside the sealed liner, not against the tub surface.
Step 2
Unfold the bladder and lay it flat in the tub with the fill sock positioned near the faucet. Smooth out major folds. The bladder does not need to be perfectly flat; it conforms to the tub shape as it fills.
Step 3
Attach the fill sock to the faucet and turn on cold water at full pressure. Fill time is approximately 20 minutes for a standard tub. Watch the water level to avoid overfilling beyond the tub rim. When full, close the fill sock valve and turn off the water.
Step 4
Use the included siphon pump to draw water into pitchers, jugs, or pots as needed. The pump inserts through the dispensing port. Reseal the port between uses to prevent contamination. Label the fill date with a marker on the bladder or tub rim.
How this fits
A WaterBOB covers the last-minute fill-before-the-storm scenario. It does not replace pre-filled containers, a gravity filter, or a treatment plan. The strongest water preparedness approach layers multiple methods.
The containers that hold water before you need a bathtub bladder. Pre-filled and ready for the no-warning scenarios.
See the comparison →
When stored water runs out, a gravity filter treats water from any freshwater source without power or pressure.
See the comparison →
Storage, treatment, collection, conservation, and resupply. The complete water preparedness picture.
Explore water →