Hemoton 4 Pcs Small Ice Packs for Lunch Boxes, Reusable Freezer Packs for Air Cooler Fan, Hard Shell Blue Ice Blocks for Breastmilk Bag, Cold

["Size for Tight Spaces: Measuring 4.5 x 1.6 x 1.2 inches (11.5x4x3cm), these compact ice blocks are designed to fit into small spaces where bulky packs won't go. Ideally sized for air cooler water tanks, kids' bento boxes, insulin travel cases, or breastmilk cooler bags","Cold Retention: Filled with advanced cooling gel, these freezer packs stay longer than ice. They provide hours of continuous chill to keep your food fresh, drinks cold, or air fan blowing during hot summer days","Leak-Proof Hard Shell Design: Unlike flimsy plastic bags that tear easily, our ice bricks feature a rugged, BPA- plastic shell. This sturdy construction prevents leaks, punctures, and mess, ensuring your lunch bag stays dry and clean","Versatile Cooling Companion: A muti-functional essential for daily life. Use them to keep sandwiches crisp for school, chill soda cans for a picnic, or insert them into your evaporative air cooler to boost its cooling efficiency. Stackable design saves freezer space","Reusable & Easy to Use: Simply place the packs in the freezer for at least 6-8 hours until solid, then they are ready to go. Completely reusable for daily use. (Note: Hand wash only with warm soapy water; do not microwave)"]