Portable and compact: slim, lightweight design stores easily in a backpack or lunch bag so you can take chilled food and drinks anywhere without added bulk. Durable construction: reinforced PE material provides long-lasting stability and resistance to cracks or breaks, built for daily use in lunch boxes and transport. Reliable cooling performance: larger internal ice crystals deliver even cold distribution and extended chill time, keeping meals and beverages cooler for longer. Versatile use: works for food cooling, safe short-term storage of expressed breast milk, and as a supplemental cold source for small fan-equipped cooling systems. Practical compatibility: compact size fits common lunchboxes, insulated bags and portable coolers; flexible enough for household use or travel. Use scenarios: Commuter lunch: place the pack in your lunchbox to keep sandwiches, salads and drinks fresh until lunchtime. Breastfeeding parent: use to maintain safe temperatures for expressed milk during outings or daycare drop-offs. Outdoor break or sports: keep snacks and beverages cool in a backpack during picnics, hikes or training sessions. Why choose this cold pack: Solves temperature control on the go: prevents spoilage and maintains freshness without bulky ice. Built for repeated use: tough PE construction stands up to daily handling. Consistent cold delivery: optimized internal structure extends effective cooling time for a variety of needs.