These are big enough for a long drink or a decent amount of soft drink with ice. The double wall is great for keeping your cold drinks cold (& no condensation running onto your table) and also hot drinks hot (without burning your hands or table... watch out for your mouth though!) They're also fine to put in the dishwasher - I haven't had any problems so far. All in all, a great buy.
I would recommend this product to a friend.