This pouch uses thermal insulation and cooling fabric on the inside. Use it with an ice pack to keep chocolates, pouches, and juice packs cold when you're on the go. It will keep things cold for a long time. You can also put in frozen pouches or jelly! Size: Top width 17 cm Bottom width 12.5 cm Height 14 cm Width 4 cm Fabric: Outer - Cotton Inner - Thermal insulation and cooling fabric You can choose your favorite fabric and have it custom-made. Please comment before purchasing. #ThermalInsulationCoolingPouch #CoolingPouch