As these products come into contact with the mouth, they must adhere to strict chemical safety standards. Ensure the supplier provides FDA (U.S.) or LFGB (EU) food-grade certification for the silicone components. Additionally, products should be BPA-free, Phthalate-free, and Lead-free. For European markets, compliance with REACH regulations and EN 1400 (though originally for infants, it serves as a quality benchmark for pacifier structural integrity) is highly recommended to ensure mechanical safety.