8PCS Replacement Spout Caps for eufy Wearable Breast Pump E10/E20/S1/S1 Pro – Dust-Proof Breast Pump Replacement Parts to Prevent Dust and Dirt from Entering

These have been such a game changer when pumping on the go or even around the house. I can pump while driving with no worries about spilling. Definitely a necessity!

Does very well at keeping milk from splashing out when pumping! Even on bumpy roads. The valves fit in perfectly with my eufy s1. Easy to wash and made of high quality silicone

These are essential if you own the Eufy. They get lost easily because they're so small but they allow for more movement. They do not make the pumps leak proof but they do allow for more activity and range of motion than without them.

Works exactly as it should.

They fit horrible and leak so much. They push the flange away from the container creating a much bigger gap. The eufy brand ones leak but in comparison these provide no peace of that just staying still and upright wouldn’t offer.

It does what it's supposed to do. I've used these on many bumps car rides and they prevented a lot of leaks. I like that they come with a lot because they are really small pieces.

These are great if you want to be able to put your pumps in the case without a cover for the charging case BUT I knocked down stars for the Super floral fragrant coming off them.

I like these better than the eufy ones! Easy to pull off with the tab. It stays snugged in the hole. Have not experienced any leaks.

Excellent quality and affordable. They do the job. Not completely spill proof but definitely better to have them than not. Eufy S1 Pro compatible.