Funny Aunty Acid Travel Mug, Stainless Coffee Tumbler 16-Ounce, Shut the Hell Up SG78425, Hilarious Gifts for Office Coworkers, Tree-Free Greetings Premium quality 16-ounce insulated travel tumbler coffee mug for hot or cold beverages. Stainless steel inner layer, comfortably curved acrylic outer layer. BPA free and Proposition 65 compliant. Rocket seal prevents condensation from forming between acrylic outer and stainless inner. Hand wash only, not dishwasher safe. Aunty Acid delivers a daily dose of sarcastic, witty, comical, humorous and sassy adult humor to both men and women. This unique cup is a great addition to your desk and will be admired by co-workers This coffee mug is sure to bring a smile to your face and makes the best gag, white elephant, christmas, or birthday gift for your co-workers, boss, friends and family. Perfect for any morning routine "I wish some people would introduce their upper lip to their lower lipand shut the hell up!" by the Backland Studio