Twistshake’s Hot or Cold – Insulated bottle with a 420ml capacity is made of the highest quality stainless steel. The slim design is perfect for your Twistshake drinks and your nursery bag! Keep your drinks hot or cold for up to 10 hours. The bottle is protected by a super soft rubber. DETAILS BPA-, BPS- BPF-free – safe for both you and your baby. Size - 420ml Capacity. Material - Stainless steel and food grade silicone