Shaken Or Stirred, The Glass Martini Freeze Cooling Cup Keeps Your Drink At The Optimal Temperature. Our Proprietary Cooling Gel Freezes Solid Inside The Double-Walled Chamber, Providing Thermal Insulation That Keeps Your Drink Cold For Longer. Real Glass Provides A Satisfying Sip - This Set Of Martini Glasses Is Constructed Out Of Real Glass, Combining The Innovation Of Our Gel-Filled Double Walled Cooling Technology With The Satisfying Feel Of Drinking Out Of Real Glass. Martinis Should Always Be Served Chilled - The Host Martini Freeze Cocktail Glasses Are Engineered Specifically To Keep Cocktails Frosty And Refreshing, Whether Shaken Or Stirred. Keep Your Martinis Colder For Way Longer Than A Regular Martini Glass. The Magic Is In The Gel - The Insulated Glass Walls Of These Stemless Martini Glasses Are Filled With Proprietary Cooling Gel That Chiils Your Beer When Frozen. Pop Them In The Freezer For Two Hours And Keep Your Drink Between 43-53 Degrees Fahrenheit. Comfort-Grip Silicone Band For Easy Sipping - The Double Walled Glass Construction Creates An Insulated Martini Glass Set That Is Perfect For The Outdoors. The Insulated Silicone Band Makes For Comfortable Handling And A Steady Grip. The Perfect Glass For A Wide Range Of Classic Cocktails - All Kinds Of Classic Cocktail Recipes Stay Frosty In The Host Martini Freeze. This Martini Glass Set Is Perfect For Dad, Or Any Cocktail Enthusiast Who Strives For The Ideal Sipping Experience.