About this project THREE SIZE DESIGNS: [Large (11"), Medium (9"), Small (6")] - The small ice pack is great for kids or smaller aches and pains, while the two larger packs are great for Adolescents and adults. Leak-Proof Large Opening Lid: The lid has a large opening for easy filling with ice cubes or crushed ice. Quick Relief: Use with cold therapy to help reduce pain and swelling from minor scrapes, bruises, muscle aches, sprains, and strains. Recommended to help relieve pain, reduce swelling and speed recovery. Stays cool much longer than gel packs or other cold packs. For sports injuries and first aid. Hot and cold therapy: For cold therapy, simply fill an ice pack two-thirds full with ice and water to relieve discomfort from headaches, bruises, migraines, muscle aches, and swelling. For hyperthermia, add hot water (do not boil, note: 50-60C/122F-140F for hot water therapy.) to help relieve stomach upset, migraines, sinus and joint pain. Home Essentials: Keep a handy ice pack at your desk, car and home for easy portability and pain-free access. Whether you're experiencing a weekend hangover, a headache or the pain and soreness of a recent visit to a chiropractor, get instant soothing relief from heat or cold therapy.