Protective Plastic Storage Case . Food-Grade 304 Stainless Steel Ice Cubes. Keep your drink exactly how you made it. Enjoy your whiskey with 100% purity. The ice cubes reusable are constructed with stainless steel instead of ice, the cubes won¡¯t ever melt and dilute the strength and flavor of your whiskey. Non-Toxic Gel Inside Keeps Ice Cubes Cold . Freeze 1 Hour Before Use . BPA Free. Hand Wash Recommended. Size 2.44" x 2.44" x 1.18"