The Tank Insert Set

$13.00 +260pts

Looking to add some firepower to your diapering arsenal? Want to ensure that you are always packing enough heat to subvert diaper disasters? Meet The Tank. The poop-suppressing, leak-quelling, bomb-proof insert that will thwart even the most sophisticated battle-plans from your heavy-wetting little warrior.

2 inserts per set (1 Small + 1 Large).

IMPORTANT NOTE: In our efforts to reduce waste and use materials that would otherwise end up in landfills, the tank print is a random print and does NOT match the diaper print. We can not exchange tank prints unless there is a product defect. Thank you for your understanding and for helping us strive toward greener earth for all! 🌏

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  1. Pre-wash or pre-rinse cycle with line 1 of detergent. This removes most of the pee.
  2. Heavy-Duty wash (longest cycle) on warm (max. 140 F/60 C) with recommended amount of detergent. Make sure you use enough detergent.
  3. Line dry when you can or tumble dry on medium.
  4. Use a reputable, commercially available detergent - Tide Original
  5. Do not use laundry soaps such as castile or coconut based soaps and detergents with fabric softener.
  6. Watch your favourite reality show. Light up a celebratory cigar with a glass of red and give yourself a pat on the back for choosing a reusable swim diaper. A cape is recommended but not necessary.

Hidden Secret Weapons

Though it may not appear as formidable as its name implies, The Tank is packed with plenty of hidden features to help it win the war on wetness. A battle-tested recipe of charcoal, bamboo and our Bamboo Stay-Dry Liners aided with PUL, join forces to form the ultimate wetness-fighting machine.

Bullet-proof leak protection

Okay, so it isn’t actually bullet proof. BUT it is lined with PUL, making it waterproof. This means that moisture stays in the inserts, letting you reuse covers and ensuring that there is no unwanted seepage. The Tank is like a diaper within a diaper.

Win the war on stains

We all have haunting flashbacks of that stain we just couldn’t defeat but with the Tank you need not worry. All front-line fighting materials that face the business end of your baby are dark coloured to hide any battle scars.

Feeling out-gunned by your baby’s ability to fill a diaper?

The best combo for leak-fighting, standard issue.

A go-to strategy for many Lil Helper veterans was to combine a small charcoal insert with a large bamboo insert, for maximum leak-fighting efficacy. It works amazingly well because the fast-absorbing charcoal insert quickly grabs and wicks away moisture. It then transfers it to its thirsty bamboo brother-in-arms, who is better equipped to shoulder the liquid load. The problem is that this mix and match approach leaves mismatched inserts. We believe in leaving no man (or insert) behind, so we have made this winning combo standard-issue from here on out.

Who says you can’t be both a fierce warrior and fashion monger?

Fierce and funky

At Lil Helper, we are suckers for any opportunity to rock a great print. That’s why we are pumped about the cute PUL prints you will find on the bottom of each Tank insert set. Plus, like any good soldier, these bad boys are all about the element of surprise. You will get a random print with every set.

K, cool, but why “the Tank”?

Because they are the best weapon for freedom-fighters doing battle with pooplosions, diaper leaks, and rashes.

The team at Lil Helper are a generally pacifistic bunch.

As loveable tree-huggers, we shy away anything more violent than an aggressive handshake. But what else would you call an insert that can hold 300 ml of moisture without breaking a sweat and be hardy enough to bear year over year of abuse - The Tank!

The tank will let your baby sleep for 12+ hours without a change and will do it while looking pretty!

When you are eyeballs deep in the trenches of parenthood things are chaotic but until the ceasefire comes, enjoy every moment of both the struggles and the snuggles and know that Lil Helper has your six both on and off the battlefield.



Looking for more specs on the Tank? Our five-star poop-fighting generals have compiled all the intel you need to draw your battle plans.

Full FAQ Page

Newbie Guide

Customer Reviews

Based on 50 reviews
Kelsey Hopkins

These are SO absorbent and clean up so well. 100% worth it and so much better than disposable diapers!

Hi Kelsey!

The amazing one here is YOU cloth diapering twins (you mentioned in your review of our disposable liners). I am very happy to hear you love the tank inserts and that Lil Helper's cloth diapers are working for you.

Please never hesitate to reach out to if you ever do need help with your wash routine. ICYMI we have a soft spot for twin parents! -->

100% overjoyed to help new parents like you,
Caitlin @ Lil Helper

Adorable and So Worth It

These inserts are a must have. They work so well, that I only need to change the cover once a day, and that’s when I put my baby in a disposable at night. They don’t leak urine at all, and I very rarely have issues with the cover getting dirty with poo. I have like 4 or 5 sets of liners per cover because they’re just that good.

The best inserts!

The tank inserts are by far the best ones. We use the charcoal ones as well, but the tanks hold more, plus I like that I can see how much pee is in the diaper vs relying on how heavy it feels.

Abigayl SLATER
Get a few extra of these

If you're thinking of trialing the nappy u recommend getting 4 of these. I ordered 1 and couldn't get a good feel for the trial at home without more of these. Once I learned how to set it up its a breeze mostly (still perfecting my technique). When ordering to the UK it takes 3-4 weeks. So UK residents please order however many you can

Tank Insert Set

Very easy to use for my newborn, and easy to wash.

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