IglooMaxcold Ice Blocks, Reusable

This little thing was about a dollar when I purchased. Works great in lunchboxes although or when you're transporting them during a road trip. I usually add one on top and one on bottom to make sure stuff stays cold. Of course, it depends on how well the box/pouch you are using. One of the better things is that they can be stacked meaning less space taken up when storing or freezing them in the freezer.

Perfect! I leave my phone in my cooler with this for 10 hours, I live in AZ, and it’s still super cold when I get in my truck! Fits in a smallish cooler perfectly. No leaks or bubbles, great quality for the price!

Used these for my lunch bag/baby bag for when I needed to carry and keep my breast milk cold while traveling or running errands or when I needed to pump and keep it cold afterwards. Very handy!

it gets cold, stays cold, what more do you want?not yet leaking the creepy liquid like some others. may still happen. but as yet, leak free and good at cold.

Got this for a bigger cooler and it works wonders. Lasts a very long time but the only downside is that it bubbled in the center, so it's no longer flat on both sides. Otherwise 5 stars.

More than expected, packed my cooler for a trip from TX to Chicago and cooler remain cold for 7 Days.

Caught these on sale, perfect to keep my lunch cold while working. Nice and slim so they fit in my lunch box

Use these in my cooler instead of ice. They stay frozen longer and take up less space.