Milk leaks out from the top of the bottle under the connector part during pumping. How can I stop the leaking?

I would suggest contacting the Medela customer service team on 0161 7760400. The fit between the bottle the connector does allow for air to enter the bottle, otherwise the pump would not be able to draw the breastmilk from the breast into the bottle, but this should not cause any issue when pumping.

The pump can be used with an expression bra

Which cup would fit (21 or 24mm) for a D cup size?

Deffo going to need the 24mm. I only use this if will be out and about because it doesn’t empty the breast fully unless you are happy to spend 30 mins on each breast on the highest setting. Get the Ardo hospital grade one for home and a expressing bra. You can thank me later haha

If I put both battery and plug, which power I’m using

If the unit is plugged in, you will be using the mains power

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Medela Swing Flex Single Electric Breast Pump - Compact Design, Featuring PersonalFit Flex Shields and Phase 2 Expression Technology

Product ID: 131280172

Details

Brand
Medela
Colour
Transparent
Included components
Adapter
Item weight
0.04 Kilograms
Material
Silicone
Model name
Medela Swing

⚡2-Phase Expression tech mimics natural rhythm

📏Compact & lightweight 0.04 kg

🔄360° rotatable PersonalFit Flex shields

S$333

Duties & taxes included

In stock

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Description

🍼 Pump smarter, not harder—comfort and efficiency in every drop!

COMPLETE PUMPING KIT - Includes two shield sizes, 150 ml bottle, adapter, and stand—everything you need to start immediately.
QUIET POWER ANYTIME - Battery or plug-operated with whisper-quiet motor—pump anytime without disruption.
TAILORED FIT FOR EVERY BODY - PersonalFit Flex shields rotate 360° with soft rims for a custom, pressure-free seal.
EFFORTLESS COMFORT ANYWHERE - Compact, portable design fits your busy lifestyle—pump discreetly on the go.
NATURAL RHYTHM MAXIMUM OUTPUT - 2-Phase Expression technology replicates baby’s suckling for efficient, comfortable milk flow.

The Medela Swing Flex Single Electric Breast Pump combines Swiss-engineered 2-Phase Expression technology with innovative PersonalFit Flex shields that rotate 360°, delivering a natural, comfortable pumping experience. Its compact, lightweight design (0.04 kg) and quiet motor make it perfect for busy millennial moms seeking convenience without compromising milk flow. Battery or plug-powered, it includes two shield sizes and a 150 ml bottle, ensuring a tailored fit and ready-to-use setup backed by a 1-year international warranty.

Specifications

ASIN	B07RWLSXPT
Best Sellers Rank	25,938 in Baby Products ( See Top 100 in Baby Products ) 507 in Breast Pumps & Accessories
Brand Name	Medela
Capacity	150 ml
Colour	Transparent
Customer Reviews	4.3 4.3 out of 5 stars (1,960)
Global Trade Identification Number	07612367055918
Included Components	Adapter, instructions
Is the item dishwasher safe?	No
Item Weight	0.04 Kilograms
Manufacturer	Medela UK Limited
Manufacturer Part Number	101033793
Manufacturer Warranty Description	1 YEAR INTERNATIONAL WARRANTY
Material Type	Silicone
Model Name	Medela Swing Flex™ 2-Phase electric breast pump
Model Number	101033793
Number of Items	1
Operation Mode	Electric
Power Source	Battery Powered
Product Style	Single electric: Swing Flex
Size	( Pack of 1)
Special Features	Portable
Unit Count	1 Piece

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