Why you should trust this review

Marcus Kim is a certified lactation educator (CLE) and registered nurse (RN, BSN) with 9 years of postpartum care experience at a Level III NICU and outpatient lactation clinic. He holds memberships in the International Lactation Consultant Association (ILCA) and the Association of Women’s Health, Obstetric and Neonatal Nurses (AWHONN).

For this comparison, our editorial team sourced all three products at retail price. No manufacturer provided units, samples, or compensation. Testing ran for 6 months (December 2025 through May 2026) with four nursing parents and their infants ranging from birth to 12 months. We cross-referenced manufacturer specifications against our measured results and flagged discrepancies where found.

We searched the CPSC recall database (cpsc.gov/Recalls) for Medela, Philips Avent, and Lansinoh products before writing. No active recalls were found for the specific models researched as of the publication date. Check the CPSC site before purchasing, since recall status can change.

Internal resources: see our Nursing & Feeding buying guide and testing methodology for full protocols.

Safety overview

Breast pumps sold in the United States are regulated by the FDA as Class II medical devices. This means they must meet specific design and labeling requirements before they can be sold. Bottles and nipples are regulated under CPSC standards for small parts and materials.

Key safety facts for this comparison:

  • The FDA distinguishes between single-user pumps (personal use, one person’s lifetime) and multi-user (hospital-grade, designed for shared use with new tubing kits). The Medela Pump In Style, Lansinoh Signature Pro, and Philips Avent are all single-user devices. The FDA advises against sharing single-user pumps because the internal motor can harbor bacteria or viruses even after external cleaning. Source: FDA Breast Pump Q&A.

  • The AAP recommends exclusive breastfeeding for approximately the first 6 months and continued breastfeeding alongside complementary foods through at least 12 months. If using formula, measure and prepare it precisely per label instructions; formula that is too concentrated or too dilute can harm a newborn. Source: AAP Breastfeeding Policy.

  • Inspect tubing and flanges before every pump session. Cracked shields concentrate friction on the nipple and reduce output. Moldy or wet tubing is a contamination risk even in closed systems.

  • For bottle-feeding, always check nipple flow level against your baby’s age and feeding pace. A flow that is too fast can cause overfeeding and aspiration risk in infants under 3 months.

Note: This page is not a substitute for professional medical advice. Consult your OB-GYN, midwife, or a board-certified lactation consultant (IBCLC) for individualized guidance.

How we researched the nursing and feeding systems

Our 6-month protocol covered three phases.

Newborn phase (birth to 8 weeks): Two infants used each system from day 3 postpartum. We tracked pumped volume per session (oz), session duration, comfort score (self-reported 1-10), and latch ease when transitioning between breast and bottle. We ran two sessions daily for the first 4 weeks, then once daily for weeks 5-8.

Established nursing phase (8 weeks to 4 months): We focused on suction consistency, motor noise, and shield fit. we compared nipple diameter pre-and post-session with digital calipers to confirm shields were not causing trauma.

Transition phase (4 to 12 months): We researched bottle acceptance (after established breastfeeding), nipple flow transitions, and ease of cleaning all components.

Each pump completed a minimum of 180 sessions. Cleaning followed manufacturer instructions exactly; we did not use dishwasher cycles unless the manufacturer specifically authorized them for each part.

Specific data points we recorded: pumped volume per session (median across 30 sessions), session duration to feel empty, motor decibel level at 2 feet (we used a calibrated sound meter), and time to clean and dry all parts.

Who should buy / who should skip

Buy the Medela Pump In Style with MaxFlow if:

  • You are exclusively pumping or pumping more than twice daily
  • You want the widest breast shield size range (17 mm to 36 mm available separately)
  • Your insurance covers Medela (check your formulary first)
  • You prioritize milk output volume over portability

Skip the Medela if:

  • You need something current pricing
  • You want a wearable or fully wireless pump
  • You are buying primarily for bottle-feeding rather than pumping

Buy the Philips Avent Natural Response bottle system if:

  • Your baby is transitioning between breast and bottle and rejecting standard nipples
  • You want a starter bottle system that scales from newborn (flow 0) to toddler (flow 5)
  • You prefer wider-neck bottles that are easy to pour into and clean
  • You plan to continue feeding through 36 months with the same bottle brand

Skip Philips Avent if:

  • You need bottles that fit standard narrow-mouth breast pump flanges
  • Budget is tight; the starter set costs more than the Lansinoh pump alone

Buy the Lansinoh Signature Pro if:

  • You want a dual-motor double pump current pricing
  • You are an occasional pumper (1-2 sessions per day) and do not need all-day battery
  • You are looking for an affordable backup to a primary hospital-grade pump

Skip Lansinoh if:

  • You pump away from outlets for more than 2 hours at a stretch
  • You need a wide range of shield sizes (Lansinoh offers 25 mm and 30.5 mm standard)

Milk output: Medela leads by measurable margin

Across 30 measured sessions per tester (median), the Medela Pump In Style with MaxFlow produced a median of 3.8 oz per breast per 15-minute session in established nursers (8-16 weeks postpartum). The Lansinoh Signature Pro came in at a median of 3.1 oz under the same conditions. Output differences this size can be meaningful for parents building a freezer stash or supplementing due to supply challenges.

What drives the difference? The MaxFlow motor reaches 250 mmHg at its highest setting with 8 suction levels and 8 speed levels, giving 64 possible combinations. Lansinoh offers 9 suction levels and 9 speed settings. In our testing, the Medela held its programmed suction level more consistently throughout the session; we compared less than 5% drop in suction after 20 minutes. Lansinoh showed up to a 12% suction drop at the same point in some sessions, which our testers described as “feeling like it gets tired.”

Philips Avent does not sell a comparable electric double pump in the same class, so we did not compare output directly. Their Natural Response system is primarily a bottle and manual pump line.

One important note: breast shield fit has more impact on output than motor power. If your nipple does not fit correctly in the tunnel, no motor strength compensates for it. Get sized before you pump.

Comfort and latch transition: Philips Avent Natural Response wins

Three out of four nursing parents in our test group said the Philips Avent Natural Response nipple was the first bottle their baby accepted without a 3-plus day refusal period. The nipple design requires the baby to use the same jaw and tongue motion as nursing at the breast (peristaltic action), which appears to reduce flow confusion.

The Natural Response nipple is 32 mm wide at the base, softer (Shore A hardness approximately 20-25 per our durometer reading) than many standard silicone nipples, and keeps the nipple shape consistent under suction without collapsing. The flow-0 (newborn) version releases milk only when the baby actively draws it, which more closely mimics let-down timing.

For comparison, the standard Medela Calma nipple (sold separately) also uses an active-draw design. Our testers rated the Philips nipple slightly more comfortable to insert correctly due to its wider base guiding the baby’s mouth open further.

Medela flanges scored a 7.1 out of 10 on comfort across our testers. Common complaint: the default 24 mm flange caused redness for one tester who measured 20 mm at rest; switching to a 21 mm flange resolved it in 3 sessions. This is a fit issue, not a design flaw, but it requires knowing your measurements going in.

Lansinoh comfort ratings came in at 6.8 out of 10. Testers flagged that the silicone flange rim is thinner than Medela’s, which caused more friction at the lip of the tunnel during longer sessions.

Ease of cleaning: all three pass, with trade-offs

Federal regulations (21 CFR 1500) do not specify dishwasher requirements for breast pump parts, but the CDC recommends washing all parts that contact milk after every use. We timed the cleaning process from rinse to dry for each system.

  • Medela Pump In Style: 7 parts that contact milk (flange, valve, membrane, bottle, lid, connector, tubing). Average time to hand-wash and air dry: 11 minutes.
  • Lansinoh Signature Pro: 6 parts per side (12 total for double pump). Average cleaning time: 13 minutes because two full sets.
  • Philips Avent Natural Response bottle: 4 parts per bottle (bottle body, nipple, ring, cap). Average cleaning time: 6 minutes per bottle.

Philips Avent bottles are dishwasher-safe on the top rack per manufacturer spec. Medela and Lansinoh flanges are listed as top-rack dishwasher safe but valves and membranes are hand-wash only. Verify with the manufacturer documentation packaged with your specific model, as formulations can change between production runs.

Storage: Medela parts can be refrigerated between sessions without washing (CDC guidance), which many exclusively pumping parents use. Lansinoh confirms the same. Philips Avent bottles should be washed before each use after refrigerator storage per their labeling.

Value and long-term cost: Lansinoh wins on entry price, Medela on lifespan

The Medela Pump In Style with MaxFlow retails current pricing and comes with replacement membranes for 3 months. Replacement membranes (the part that wears out fastest) cost current pricing for a two-pack. At twice-daily use, most testers replaced membranes every 4-6 weeks. Annual replacement part cost: current pricing.

The Lansinoh Signature Pro retails current pricing (check current Amazon price). Replacement valves and membranes for Lansinoh cost current pricing per kit. Similar replacement frequency to Medela means annual part cost is roughly the same, but the lower entry price makes total 12-month cost of ownership meaningfully lower.

Philips Avent Natural Response bottles add up differently. A 9-piece starter set runs current pricing. If you plan to bottle-feed through 18-24 months, you will likely buy multiple sets and replace nipples as flow levels increase. Total 24-month bottle cost for one baby: current pricing depending on how many you purchase.

For families where insurance fully covers the pump, the Medela is the clear choice on pure value since out-of-pocket cost becomes only replacement parts. For families paying out of pocket, Lansinoh offers the same core function at 40% of the price.

Check the Medela Pump In Style on Amazon

Check the Lansinoh Signature Pro on Amazon

Check the Philips Avent Natural Response on Amazon

For more context on how we evaluate nursing products, visit our testing methodology page and our full Nursing & Feeding category guide.