Good Cold Retention Coarse ice crystal particles provide strong expansion and lasting cooling performance to keep food and drinks cool for hours. This helps preserve freshness and prevent spoilage during daily use or travel. Durable Material Constructed from thickened PE, these ice packs are durable and resistant to damage. They provide reliable, long term use for meal preservation and repeated cooling needs. Compact and Portable Designed with a small profile and light build, these ice packs are easy to carry and can be added to any bag without bulk. They deliver practical cooling power wherever you go. Easy to Use Add water to activate the ice crystal expansion, then freeze the pack for 24 hours. This simple method provides an effective way to maintain chill in your lunch container or bag throughout the day. Key attributes Function: keeps food and drinks cool for extended periods Material: thickened PE for durability Size: compact and lightweight for portability Performance: reliable, long lasting cooling User process: water activation and 24 hour freeze Use scenarios Daily lunch or work/school bag: place in lunch boxes or tote bags to maintain cold meals and beverages during commutes. Outdoor activities: use in picnic baskets, small coolers, or backpacks on day trips, hikes, or road trips to extend freshness. Short trips and errands: keep groceries, snacks, and perishable items cool in compact coolers or carriers during errands or travel.