The Tank Insert Set

$21.00 +420pts

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! 🌏

Bundle Ready
Get this in one of our trademark bundles!
Shop bundles






  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 55 reviews
Laura K
the best inserts!

These are truly a tank in what they can hold. They are the best inserts I've used! Perfect for my tummy leaks after nap time!

Hi Laura!
Sleep is a beautiful thing and I am delighted that our inserts have helped your tummy sleeper!
Remember, you can always get personalized fit and wash routine help from us just by emailing
Thank you for the love,
Have a joyful day,
Caitlin @ Lil Helper


I love everything. Thank you! I can't wait to use it with my baby.

Hi Wilmary, please come back and let us know what you think once you've tried your inserts! And our Delight Team is on stand by ready to answer all your cloth diaper questions should you have a need.
Sending so much love,
Caitlin @ Lil Helper

Beautiful Addition

Below is my review for the diaper but it honestly is the same for these inserts. Don't wait get set up ahead of time and feel confident about your purchase. I believe this is also a small shop that we can support.

So I purchased the diapers for my daughter who is giving birth to her second child. With the cost of everything at all time ridiculous levels she decided to go this route this time. The expense of diapers even at a good price is nothing to be excited about. She researched everything thoroughly and settled on these. She purchased the first order and her and I absolutely love everything about them! They are adorable! Made with an amazing quality and we are excited for the new one to arrive to begin using them. I'll have to update later about that but we are both quite sure at this point we will be quite happy. Between us we have purchased three sets of these beautiful diapers. I agree with another reviewer, don't wait go on and get some!

Thank you Angela!
We are indeed a small company (smaller than most people realize) and truly try to live up to our values of Kind Capitalism. Just out here trying to make the most user-friendly reusables we can and spread a little joy while we are at it!
Thank you so much for taking the time to share the Lil Helper love, it means the whole universe to us!
Reach out to us at if you ever need help with your diapers or anything else at all- we are here to help!
With so much gratitude,
Caitlin @ Lil Helper

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

Catelin Begay
Nice and soft

We haven't been able to try them out quite yet, as our baby is still got a few weeks left till her grand arrival. But I can say that they feel nice and soft. And the fact that its almost like having 2 sizes in one is fantastic. We are looking forward to using these for our little girl.

You might also like