The Genuine Lactation guide above states Elvie cups and Bwecece cups do not pair well with the Ardo Alyssa due to the suction pattern. No issues noted with other brands in the guide including Spectra Cara Cups, Freemie OG, Freemie Slim, Idaho Jones, Legendairy milk, Medela, Phanpy, Rumble Tuff, Zomee.
