Ideal for a smooth transition from breast or bottle to independent drinking. Glass is the safest material for drinking cups and bottles. As a natural raw material, it is free from plasticizers and other chemicals. Guaranteed free of plastic where the product comes into contact with food or the baby's mouth. The silicone sleeve not only gives the bottles a stylish appearance but also provides additional protection and a very pleasant feel (not shatterproof). Features a pleasantly soft silicone drinking spout. Leak-proof. Includes ergonomically shaped, easy-to-hold training handles and a protective lid. Made from high-quality, extra-light borosilicate glass: very resistant to chemicals and temperature. Insensitive to sudden temperature changes. Made from particularly high-quality silicone: free from harmful chemical substances. BPA, BPF, BPS, and phthalate-free.