Choose the format around your routine
A filter jug avoids a permanent change to your plumbing. Its main commitments are space in the fridge, regular refilling, cleaning and replacement cartridges. A larger dispenser can suit a shared kitchen, but needs a stable shelf and enough room to reach its spout.
Before choosing, ask how you will use it. A glass at lunch makes different demands from filling several bottles before leaving the house. Buying a much larger reservoir is useful only if you will use the water and can clean the container comfortably.
Use buying advice by household priority if you are still choosing between a portable container and an installed system.
Measure capacity and choose a jug
- Ready-to-pour capacity. Compare filtered litres rather than total jug volume. In our shortlist, the Marella Cool holds 1.4 litres filtered; the XL holds 2.0 litres. Those are different refill routines, even though they share a cartridge family.
- Physical fit. Measure the usable fridge-door space, including anything that narrows it. Leave enough clearance to lift the jug out. A product described as fridge-friendly cannot guarantee a fit in your fridge.
- Replacement support. Find the exact current cartridge, its pack options and its service-life instructions before buying the jug. A bundled cartridge supply can make the initial purchase convenient, but does not remove future replacement costs.
The BRITA product page gives dimensions and filtered capacities for both Marella sizes. The Aqua Optima Liscia page gives its own dimensions and capacity; do not assume that similarly sized jugs store the same amount of filtered water.
Space and capacity
- Small jugs for fridge doors: dimensions and measuring
- Large jug vs dispenser: capacity, weight and refilling
- Marella vs Marella XL
- BRITA Flow: shelf space, serving and filters
Cartridge purpose and model choice
Choose the cartridge before the jug bundle
The jug is the container; the cartridge does the filtering. A cartridge intended to improve taste is not automatically the right answer to a hardness concern. Within the MAXTRA PRO family, BRITA positions Pure Performance for everyday use and Limescale Expert for hard to very hard water. Read the exact cartridge specification rather than treating every pack bearing the brand name as interchangeable in purpose.
Use our cartridge and cost starting point to check fit and replacement intervals before comparing the first-purchase price.
BRITA MAXTRA PRO Pure Performance · 6 pack
The everyday-purpose MAXTRA PRO replacement for compatible BRITA jugs and Flow. Compare this six-pack with the cartridges already included in your chosen starter bundle.
- Pack
- 6 cartridges
- Family
- MAXTRA PRO
- Limit
- 150L / 4 weeks
Good forRestocking a compatible MAXTRA PRO system.
Watch forFour weeks can arrive long before 150 litres.
Check the MAXTRA PRO family against your jug instructions. It is not a replacement for BRITA Classic, MicroDisc or ON TAP cartridges.
BRITA MAXTRA PRO Limescale Expert · 6 pack
A MAXTRA PRO option for a hard-water kettle-scale priority, without changing a compatible jug or Flow dispenser.
- Pack
- 6 cartridges
- Family
- MAXTRA PRO
- Limit
- 150L / 4 weeks
Good forComparing a scale-focused refill for a compatible jug.
Watch forWater conditions can shorten the stated maximum life.
BRITA positions this type for hard to very hard water. It treats the water you filter through the jug; it does not soften the whole household supply.
Compare more jug and refill systems
A different cartridge system can change ownership more than a different handle or colour. Compare the filtration purpose, its actual replacement trigger and the availability of the correct UK refill.
- BRITA vs ZeroWater: filtration, cartridge life and ownership costs
- ZeroWater jugs and dispensers UK: choosing the right size and system
- ZeroWater cartridge compatibility: legacy filters vs newer Culligan systems
- BWT Penguin water filter jug: capacity, cartridges and everyday use
- BWT jug cartridge compatibility: sealed cartridges, refillable cartridges and granules
- BWT vs BRITA water filter jugs: cartridge choices and ongoing costs
- Philips Micro X-Clean water filter jugs: UK models and buying considerations
- Philips jug cartridge compatibility: matching Micro X-Clean filters to your model
Glass and refillable alternatives
- Glass water filter jugs: options and ownership costs
- Aarke Purifier: granules, upkeep and costs
- PHOX V2 refillable jug guide
Choose a larger dispenser or gravity system
A dispenser is worth considering when several people regularly use filtered water in the same place. Check its filtered reservoir, full weight and tap clearance. A handle does not make a full tank easy to carry. If constant refilling remains inconvenient, explore tap and under-sink choices with their fitting and installation requirements in mind.
BRITA Flow 8.2L dispenser
A dispensing tank to consider when several people pour from the same place. Its larger reservoir offers more filtered water between refills than the jugs in our shortlist.
- Filtered / total
- 5.2 / 8.2L
- Format
- Dispensing tank
- Cartridge
- MAXTRA PRO
Good forServing several glasses without lifting a full jug.
Watch forShelf space, full weight and access for cleaning.
Check a stable shelf, room above the sliding lid and space below the dispensing tap. A larger tank still uses a MAXTRA PRO cartridge with its own replacement limit.
BRITA gives Flow a 5.2-litre filtered reservoir within its 8.2-litre total capacity. Its dimensions are 30.4 × 22 × 21.4cm (W × H × D). Measure the shelf and leave room to dispense into your glass.
See the three-jug comparison, including a capacity table and a practical way to budget for cartridges.
The Perfect Pour guide covers a different dispenser arrangement, including shelf fit and paired Evolve+ refills.
Gravity filters and ceramic candles
Gravity systems introduce candle selection, assembly and a separate cleaning routine. Use these guides when you want to compare that format with a jug.
- Best gravity water filters for UK homes: systems, filter options and upkeep
- Gravity water filter vs filter jug: space, speed and daily use
- British Berkefeld 6L vs 8.5L vs 12L: choosing a practical size
- British Berkefeld Ultra Sterasyl vs Ultra Fluoride: differences and compatibility
Once you have chosen a system, use the British Berkefeld assembly guide, stainless chamber and tap cleaning guide and ceramic candle care guide. For a fault, start with slow gravity flow or leaks and overflows before ordering a replacement.
The British Berkefeld manufacturer range is the source for the current system and candle options. Check the grade supplied with the selected bundle; matching vessel size alone is not enough.
Compare heated, chilled and reverse-osmosis appliances
A powered appliance can change temperature or treatment as well as storage. Allow space to refill and remove tanks, check the matching consumables and plan for cleaning. These are separate decisions from simply choosing a larger jug.
- Best countertop reverse-osmosis water filters for UK homes
- Countertop RO vs under-sink RO: refilling, installation and daily maintenance
- Aqua Optima Aurora hot-and-cold dispenser: UK versions, capacity and upkeep
- Aqua Optima Lumi chiller: cooling, counter space and replacement filters
- BRITA Cube buying guide: temperature settings, tank capacity and filter costs
- Filtered hot-water dispenser vs kettle: convenience, temperature and electricity costs
- Chilled water dispenser vs fridge filter jug: capacity, cooling and cleaning
For ownership after purchase, see model-specific descaling and RO tank cleaning and reject water. Appliance names can cover several versions: Aqua Optima’s downloads separate the serial-code manuals, so keep the exact label details.
Keep the system working after purchase
Read the component cleaning guide before washing a lid or indicator. For slow filtering or unexpected specks, check the cause before buying another jug. The fridge-storage guide and holiday restart guide explain the different routines for stored water and an unused cartridge.
If refilling remains the main inconvenience, compare jugs, tap-mounted filters and under-sink systems before changing formats.
Questions about jugs and dispensers
Which capacity should I compare when choosing a jug?
Compare filtered capacity: the water ready to pour after one reservoir has passed through the filter. Total volume includes the upper reservoir and can make a jug appear more useful for several bottles than it is.
Does a bigger jug make its cartridge last longer?
No. A larger container can reduce refilling, but the cartridge keeps its own time and volume limits. Higher household consumption can bring the volume limit around sooner.
Should I choose a dispenser instead?
Consider a dispenser when several people use water in the same place. Check shelf strength, full weight, tap clearance and cleaning access as well as filtered capacity.
Is a gravity filter the same as a countertop RO appliance?
No. A gravity system passes water through its specified candles without a plumbed supply. A countertop reverse-osmosis appliance has a membrane, power and tank-care requirements. Compare the exact treatment claims and daily routine rather than choosing by tank size alone.
Where should I start if kettle scale is my main concern?
Use the hard-water jug guide and check the exact cartridge’s hardness-reduction claim. A taste-focused filter or a larger jug does not automatically reduce scale.