Slim Ice Packs for Coolers: Extra Large 13 x 9.5inches and only 0.6 inches thick. Don't take up much cooler space at all. Keep in coolers & Keep drinks cool Easy to Use: Add water for the first time using, screw the cap on, shake well and wait for 5 minutes into a gel state and freeze the night before use. Then can be frozen directly for reuse Stays Cold Longer: Perfect for Cooler, keep cold and fresh for 18 hours. Also use with OUTXE Cooler Backpack, reusable shopping bags, ice boxes No Messy Cleanup: Not like ice, Lasting cold, Keep your food fresh and crisp.5-pack! Great for grocery shopping, picnics, camping, and fishing Safe&Durable: OUTXE cooler ice packs are made with 100% BPA-Free Non-Toxic materials. Easy to clean and reusable, a great replacement for traditional ice cubes Slim Ice Packs for Coolers: Extra Large 13 x 9.5inch and only 0.6 inches thick. Don't take up much cooler space at all. Keep in coolers & Keep drinks cool.