My latest impulsive shopping purchase was these stainless steel reusable drinking straws. They are 6mm diameter, not sure of the bore or wall thickness because the ends are rounded over but they are very thin wall and look seamless. Comes with a neat little cleaning brush too!

Not sure why I bought them, they just look handy, so for £3,99 for 10 I thought why not! Wierdly they had packets of four for the same price.
So, apart from drinking, can anyone think of a use for these?
Ian