This cup is the most spectacular invention of the century. It keeps your drink icy cold for hours and yet your fingers don't freeze off. I like to have iced drinks at work and the ice doesn't melt for hours and hours, meaning my drinks aren't diluted. I love the environmental aspect to not adding to the single use plastic trash pile, and I have never once come across a vendor who refused to put their drink in my cup, actually most commend me for not using plastic. This is a costly outlay but you will soon wonder how you ever lived without it. Plus the Cheeki customer service team is second to none, a lovely bunch :) Thanks Cheeki. Im buying these for all my friends as presents now.