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Aqua Optima

Aqua Optima Oria Water Filter Jug & 6 Evolve+ Filter Cartridges, 2.8L, White

A slim, fridge-fitting 2.8 L filter jug sold with six Evolve+ cartridges. The listing describes five-stage filtration that reduces limescale, chlorine and microplastics, and gives 100 litres per cartridge.

Updated October 10, 2026

Buying decision illustration for Aqua Optima undefined: 2.8 L, 11 cm deep; 6 cartridges in the box; 100 L per cartridge. Not a product photograph.
Original buying guide illustration; not a product photograph.
  • 2.8 L total capacity; H250 x W260 x D110 mm, described as fridge-fitting (listing).
  • Sold with 6 Evolve+ cartridges (listing).
  • Evolve+ five-stage filtration reduces limescale, chlorine, microplastics and other impurities (listing).
  • 100 litres per cartridge (listing).
  • Described as dishwasher friendly; made by Laica (listing).

Good for

One or two people who want a slim jug for the fridge door with a supply of cartridges in the box.

Our take

On this page

Our verdict

The Oria is the slim alternative: 11 cm deep, 2.8 litres in total, described as fridge-fitting, and sold with six Evolve+ cartridges so you are not buying refills straight away. The listing says Evolve+ reduces limescale along with chlorine, microplastics and other impurities, and gives 100 litres per cartridge. What it does not give is a limescale reduction figure or the filtered capacity, so you cannot compare it like for like with BRITA's Limescale Expert. Skip it if limescale is your main reason for buying and you want the strongest published claim. The variant trap: the Oria is sold with 6 or 9 cartridges and in several colours, and Aqua Optima also sells the Liscia and Perfect Pour jugs, so check the title.

Cartridge maths

At 100 litres per cartridge, a household filtering 3 litres a day gets about 33 days from each. Check the pack for a time limit as well and change at whichever comes first.

FAQ

Does it fit a fridge door?

The listing calls it fridge-fitting and gives a depth of 110 mm. Measure your door shelf to be sure.

Do BRITA cartridges fit it?

The listing does not say so. Use Evolve+ cartridges made for the Oria.

How we researched this

We read the Amazon.co.uk listing and Thames Water's hard water page on 2026-10-10. Aqua Optima's own website could not be opened when we checked. We did not test the jug.

Sources

Featured in these guides

Buying guideHome & kitchen

Filter jug for hard water: is it worth it, and which one should you buy?

What a filter jug does and does not do in a UK hard water area: less kettle scale and better-tasting tea, not a softened house. How to pick the cartridge first and the jug second, how many cartridges a year you will need, what fits a fridge door, and when to use plain tap water instead, including for baby formula.

10 min readOct 10, 2026

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