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

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 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!

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.

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.

Was constantly spilling milk out of my pump when leaning over. These have helped save so much of my milk! The only issue I’ve had is it makes slight gapping in the milk spout.

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.

Works exactly as it should.

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.

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