OKUYOSHI Stainless Steel Ice Convenient for Cooler Shopping and Square Set of 4 Packs, Long-Lasting Cooling, Reusable, Powerful, Lunchboxes, Picnics,

[Strong Cooling Retention - Up to -20°C] Made with food-grade 304 stainless steel, it's heat-resistant and acid-resistant, so you won't have to worry about rust or corrosion even after extended use. The coolant inside keeps the drink cool for approximately 5-6 hours, depending on the outside temperature. It boasts a powerful cooling capacity, reaching temperatures as low as -20°C. [Carefully Polished Finish] The surface has been precisely polished to achieve a smooth texture that is gentle on the hand. It is shock-resistant, durable, and will not break even if dropped, allowing for repeated use. It is an eco-friendly design that is kind to both the environment and your wallet. [No Odor Transfer & Easy to Clean] The non-porous stainless steel construction prevents liquids from penetrating, leaving no odors or tastes after use. It can be easily washed with water, so it stays clean and hygienic. It's safe to use with food. [Compact and lightweight design] The lightweight and slim design makes it easy to carry. It can be neatly stored in small spaces such as refrigerators, coolers, bags, and car gaps. It is perfect for going out, traveling, commuting to work or school. [Versatile] Perfect for picnics, outdoor activities, and camping, or paired with an insulated bag to keep food fresh while shopping. It's also great for a wide range of uses, including packing lunches for school or the office, keeping fish cool while fishing, and more. Available in two shapes: square and round. An essential item for keeping food fresh! Keep your food fresh at all times with OKUYOSHI stainless steel ice packs.