[Upgraded cup lid] After market research, we upgraded the cup lid. (1) The sliding piece is changed from transparent to black, which is more resistant to dirt. (2) The thickened silicone ring prevents the cup from spilling even if it is inverted, and the insulation effect is better. [Premium Design] The vacuum insulated coffee mug is made of high-quality 18/8 stainless steel, which is durable and never rusts. The design is suitable for laser engraving, and the powder spraying process brings beautiful colors, as if it is an elegant pearlescent surface, which is beautiful and practical, prevents sweat stains and is easy to clean. [Vacuum Insulation Technology] Volhoply's mug uses double-layer vacuum insulation technology to keep your drinks warm for a long time whether indoors or outdoors, keeping your favorite drinks hot for more than 3 hours and cold for more than 9 hours. [Multi-purpose] The 14-ounce stainless steel coffee mug is perfect for daily use, suitable for office, home, garden, and also very suitable for outdoor travel coffee mugs. Thanks to the high-quality spray painting process and insulation technology, take it to the beach, camping, outdoor travel, and enjoy the good times on the journey. Suitable for various festivals, it can be a perfect gift for birthdays, Mother's Day, Father's Day, Christmas, as a gift for your important people and harvest their happy smiles. <br>