Nuby ID10264 Thermal Stainless Steel Cup with Straw 360 ml"SKU #NB ID10264 The Stainless Steel Thermo Straw Cup by Nby keeps all hot and cold drinks at the perfect temperature for up to 6 hours. In a nutshell 24m+ 6 hours temperature control Sweat proof The double insulated wall keeps the outside of the cup at temperature Leak proof technology: Hear the click, know its locked Soft silicone thin straw, for faster liquid flow The hygienic flip cover with push nub keeps the straw clean when not in use.