Vacuum Insulated Technology: Eggshell thermos cup are with double walled vacuum insulation technology, keeping your favorite beverages hot for 6+ hours and cold for 12+ hours. Sweat proof, no condensation. Press-in Lid: Achieve maximum spill proof capability. Wide drinking hole on the top, straw friendly. The sliding cover is to prevent heat/ cold from escaping. It is not leak proof.You can easily see how much of your drink have left through durable clear lid. The wide, comfort-grip, non-slippery will help you to grasp your coffee mug in a warm and affectionate embrace, also makes it easy to drink from. Unique gift ideas: Great gift ideas for Inspirational woman, yourself, best friends, wife, girl friends, her, mom, grandma, sister, aunt, daughter, teacher, employee, niece, nurses, neighbors, coworkers and someone important for you. Widely Applicable: Suitable for Valentine's Day, Christmas, Birthday, Dating, Anniversary. The 12-ounce capacity allows you to keep enough water. Wine, beer, coffee, beverages, champagne, cocktails and other alcoholic beverages are suitable. It is suitable for indoor and outdoor use. lake, beach, swimming. Customer service: We’ve got you covered anytime you have any issue regarding our product quality or any problem during use.