Double Wall Glass for Insulation & Heat Resistance: Thermal Insulated Glass Tumbers Will Protect Hands from Heat Easy to Hold and Cool to touch. Drinks Keeps Hotter for Longer Than Ceramic and Plastic Cups. Definitely Good Glass Mugs for Hot Drinks. .Hand Made & Lovely: Thermal Mug Is Made from Mouth-Blown Borosilicate Glass (Lead Free, Safe for Health) So It'S Lightweight, Handmade Like Personalized and Mugs for A Unique Coffee Gift, Very Stylish. Coffee Appears to Float In The Glass. Lovely Valentines/ Mothers/ Easter Gifts for Men and Women. .Dishwasher Safe: It'S Okay to Put Double Walled Glass Mugs In Dishwasher But Hand Washing Is Always Highly Recommended Because Clear Glass Is Easy to Clean, Better for Long Life. Handle with Care and The Coffee Glasses Will Be A Good Addition to Kitchen Set. .Ideal for Gifts for Him/Her: Cupsheknows Double Walled Glass Set Is Well Pack Gifted and Ready for Birthdays/Valentines Day Gifts for Women/Men, Thank You Gifts, Fathers/Mothers Day Gifts. 3-Month Guarantee: Pls. Contact Supplier to Get A New One Instead If Yours Has Something Bad. .