From a glow Prom theme to a starry night Prom theme, this Pandora Tumbler with Iridescent Rays Insert is a smart custom favor for your students. The formal-looking double-wall tumbler holds 16 oz. and includes a clear lid and straw. A unique black insert features rays and the word "Prom" in an iridescent rainbow effect. Customize your tumbler by adding your choice of custom text (up to two lines) below the word "Prom". Students will love a Prom favor with a personalized touch like this!