Igloo Performance Ice Block - With Performance Ice you get extreme, long-lasting cooling power without the watery mess. This modular ice block is next-level, designed thicker to hold more of Igloo's supercharged freezing gel with a relatively small surface area, which means it keeps your lunch cooler bag ice-cold way longer and the refreshments inside enjoyably frosty. Features: Refreezable & reusable ice pack that provides a long-lasting, mess-free ice substitute Dynamic, non-toxic gel delivers extended cooling performance To have an ICE day, we recommend you pack your cooler bag or small lunch-sized hardside cooler with 1 (or more) Performance Ice Mini Lunch Block Made for ALL coolers, maximized for use with Igloo coolers