launch offer: 10% off with code BROOK10 · free US shipping
purlbrook. cart0
brook 1-year filter kit — 12 cartridges + 4 cotton pads

brook filters — 1-year kit (12 cartridges + 4 pads)

$24.99$39.99 save 38%

free US shipping · arrives in 4–7 days · 30-day easy returns

getting a brook too? the bundle saves you about $10 →

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  • whisper-quiet
  • cordless
  • stainless steel
  • 3.2L capacity
ships within 24–48h · arrives in 4–7 business days, tracked

in the box

  • 12 dual-layer filter cartridges
  • 4 filter cotton pads

The refill that keeps brook honest: 12 dual-layer cartridges and 4 filter cotton pads — the official ones, made for brook's stainless tray. Activated carbon tucked inside soft filter cotton quietly catches hair, dust and odors between rinses, so the water she drinks tastes like water.

Swap the cartridge about once a month — lift the tray, drop one in, done. Twelve swaps, twelve months. Your first cartridge came in the box with brook.

Fits every brook, both finishes.

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fair questions

Does it need filters?

A filter element comes in the box, ready to go. We're adding replacement packs to the store — and the steel tray rinses clean in seconds meanwhile, so nothing builds up while you wait.

How does charging work?

A 4000mAh battery charges over USB-C — cable included, just like your phone. Once it's charged, there's no cord anywhere near her water.

Is it actually quiet?

Yes — that's the point of the whole brand. It's designed to live next to your bed. If it ever gets noisy, the water is low; top it up and it settles.

How do I clean it?

Lift the steel tray, rinse, done. A cleaning brush is included for the corners. No maze of plastic parts, nowhere for slime to hide.

How fast is shipping?

Fast tracked delivery — typically 4–7 days anywhere in the US, free, with tracking on every order.

What if my cat ignores it?

Give it a few days — cats need time with new things. If it's still a no, you have 30 days from delivery: email us and we'll sort it out. See our refund policy for the plain-English details.

all questions, answered plainly