Oxo Tot Grow Replacement Straw Set, 2 pcs (6 oz)Description Why Youll Love It: Almond shaped, spill proof straw conforms to tots mouth and minimizes mess Straw valve opens as soon as tots lips touch spout for easy drinking The OXO Tot Transition Series features interchangeable cups and lids. Care Instructions Washing with warm soapy water will do. Do not expose any plastic silicone product to extreme heat or UV as it may cause damage and increase wear and tear.