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Which Liner Fits Birth Pool in a Box? Sizing and Compatibility by Model
Birth Pool in a Box uses a fitted, single-use liner sized to each pool: a Regular liner for the Regular pool and a Mini liner for the Mini pool. Always match the liner to your pool's size — a Regular liner will not sit correctly in a Mini, and a Mini liner won't cover a Regular. The fitted liner is shaped to the pool's contours, including the seat, so it stays smooth and secure while you labor, keeps the water clean, and makes cleanup simple: you drain, remove the liner, and the pool underneath stays hygienic for next time. A generic flat liner can bunch, slip or fail to cover the seat, which is why we recommend the fitted liner made for your model. Order one liner per birth, or a case if you're a midwife or birth center reusing the pool.
Do I actually need a liner?
Yes. A liner is what makes an inflatable birth pool both hygienic and reusable. It creates a fresh, clean barrier between you and the pool for every birth, so the pool itself never has to be sterilized between uses. Skipping the liner — or improvising with a sheet of plastic — risks a poor fit, contamination and a pool you can't confidently reuse. For the small cost of a fitted liner, you protect the whole setup. Our short video below shows exactly why this matters.
Which liner fits the Regular pool?
The Birth Pool in a Box Regular liner is made for the Regular pool. It's shaped to the Regular's larger interior and seat, so it lies flat and stays put. If you have a Regular pool, this is the liner to order — singly for a single birth, or in a case if you'll use the pool more than once.
Which liner fits the Mini pool?
The Birth Pool in a Box Mini liner is made for the Mini pool's smaller footprint and seat. Don't be tempted to use a Regular liner "to be safe" — the excess material bunches and can trap water in folds. Match the Mini liner to the Mini pool for a clean, secure fit.
What about the "Eco" liners — are they different?
You'll see liners labeled "Eco Regular" and "Eco Mini." As with the pools, "Eco" is simply the current Birth Pool in a Box line — the Eco liners are the fitted liners for the current Eco pools. So the rule stays the same: Eco Regular liner for the Regular pool, Eco Mini liner for the Mini pool. You can browse them all in our Birth Pool in a Box liners collection.
Can I use a generic liner instead?
We stock generic disposable liners for people using other pools, but for a Birth Pool in a Box we recommend the fitted liner every time. A fitted liner is contoured to the pool and seat; a generic liner is a flat bag that can shift, wrinkle and leave the seat uncovered. During labor the last thing you want is a liner sliding or pooling water where it shouldn't. The fitted liner costs a little more and is worth it.
How many liners do I need?
One liner per birth. Home-birth families usually order a single liner (many pool packages already include one). Midwives and birth centers who reuse a Professional pool order liners in cases of 5 or 10 so there's always a fresh one on hand. The table below matches pool to liner at a glance.
| Your pool | Liner to order | Buy singly or… |
|---|---|---|
| Birth Pool in a Box Regular (Eco) | Regular / Eco Regular liner | Single, or case of 5 / 10 |
| Birth Pool in a Box Mini (Eco) | Mini / Eco Mini liner | Single, or case of 5 / 10 |
| Another / older pool | Generic disposable liner (check size) | Single |
Frequently asked questions
Which liner fits Birth Pool in a Box?
Match the liner to your pool size: a Regular (Eco Regular) liner for the Regular pool, and a Mini (Eco Mini) liner for the Mini pool. The fitted liner is contoured to the pool and its seat.
Can I reuse a birth pool liner?
No — liners are single-use. Use a fresh fitted liner for every birth. That's what keeps the pool itself hygienic and reusable.
Is a fitted liner better than a generic one?
Yes. A fitted liner is shaped to the pool and seat so it stays smooth and secure. A generic flat liner can bunch, slip and leave the seat uncovered.
Does the pool package include a liner?
Many Birth Pool in a Box packages include one liner. Check your package, and order a spare if you want a backup on the day.
Written by Marla, Owner, Waterbirth Solutions. Marla is the owner of Waterbirth Solutions, America's exclusive distributor of Birth Pool in a Box, and has spent nearly two decades supplying US home-birth families and midwives with pools, liners and accessories.
Published 31 July 2026.