Shop › “Gravy Sluts of America” mug by Liz Born Image 1 of 3 Image 2 of 3 Image 3 of 3 “Gravy Sluts of America” mug by Liz Born $65.00 If you know, you know. Foodsafe, microwave and dishwasher safe. Stoneware thrown by hand, with silkscreen slip transfer. Quantity: Add To Cart Added! If you know, you know. Foodsafe, microwave and dishwasher safe. Stoneware thrown by hand, with silkscreen slip transfer.