Material: Made using sturdy ceramic so it's built to last over the years. Personalise: Personalise with up to 50 characters - add a special message! Other features: An 11oz mug that's microwave and dishwasher safe. Gifting: Great as a funny secret Santa gift or as a keepsake for yourself! Naughty Xmas mug: Get a personalised Christmas novelty willy mug! Designs: Choose from Christmas tree, Santa or Christmas Gifts designs. | Personalised Xmas Novelty Willy Mug | Wowcher