Please pay attention to the size of the straw before purchasing.
Our straw caps are specifically designed for 10mm(0.4in) diameter straws and are not suitable for other diameters such as 6mm(0.24in), 8mm(0.31in), 12mm(0.47in), and so on.
Are They Fit Stanley Cup?
Our straw caps are specifically designed to fit 10mm(0.4in) straws, and they work perfectly with Stanley cups that have10mm(0.4in) straws. However, they are not compatible with 6mm(0.24in) or 8mm(0.31in) straws.