Mugzie Nervous Ned "Mini" Travel Mug with Insulated Wetsuit Cover, 12 oz, Black 12 Oz Stainless Steel Travel Mug covered with water-proof, neoprene wetsuit material. Hand-sewn fabric cover is made from 1/4 inch closed-cell neoprene that is covered with soft, water-proof polyester fabric. Stain-resistant cover is printed in hi-resolution and has full-wrap coverage. Spill resistant lid and a non-skid bottom. Cushioned cover affords a secure grip and eliminates condensation and sweating. Fits in most car cup holders and the counter-weighted bottom provides stability. Bottom diameter is 2  inches. Patented. Truly unique. Made in the USA.