elvie seals

Elvie seals and related components are primarily made from silicone (often listed as food-grade and BPA-free). Other materials noted across product listings include ABS, polypropylene, and PVC.

Many Elvie parts can be washed with soap and water, cleaned on the top rack of a dishwasher, or sterilized using microwave/steam/boil methods; items should also be washed before first use. Note that some components are explicitly non-washable and should only be wiped dry (see the specific part instructions).

A closed system means the seals or diaphragms attach to the pump’s breast shields to create a hygienic barrier, preventing breastmilk from entering the pump mechanism and keeping milk contained and separate.

Replacement seals and diaphragms are most commonly sold in 2‑packs. Some listings or kits show higher counts (for example, listings with a 6‑count kit appear in search results).

Reviews report improved suction and a tighter, more effective seal and fit compared with earlier parts. Commenters note design changes such as additional lips that contribute to a perceived performance improvement.