The Unemployed Philosophers Guild Disappearing Dino Mug - Heat Sensitive Color Changing Coffee Mug - Add Hot Liquid and Watch Dinosaurs Turn to Fossils,12 fl oz

I ordered two mugs, one to keep and one to give away. They arrived unharmed and as advertised: pictures of dinosaurs, that turn to skeletons if you fill the mug with something hot. I, and the giftee, are science fiction fans; fans love dinosaurs.

My grandson loves it.

Yes, we’ve had it since 2013 and this is what it looks like 11 years later. The paint rubbed off in a few spots but it still works! Make sure to never put it in a dish washer, the coating will melt away!! We put it in the dishwasher by mistake once or twice that’s why it has these small white spots where the paint is gone, otherwise it would have probably still looked like new.

Really quite an amazing mug! It's been two months and I use it about three times a week, hand washing every time very, very gently. Still in pristine condition! Have not noticed what most people say as a color fading.Some tips:Do everything the instructions tell you. Also let anyone who may do the dishes know about the care instructions. Once when I had left it at the sink counter (to wash later) I found it in the dishwasher, right before I started it! So thankful I don't trust the hubby to remember all the ones that can't go in the washer. This is pricey to replace!The mug changes very well, however, it's a "fresh" cup of coffee mug, or a water heater mug. It doesn't show its best as a "warm up for one minute" mug, the magic really happens when you pour fresh hot liquids into it. However, it does not take very long at all to start changing.The VERY bottom of the mug does not change for me. This could be a problem with all the mugs or just mine, but on the very bottom where the dinosaur labels would be if it were to change, they only change halfway because it does not sit exactly where the hot liquid would be. It is further down, meaning hot liquid never actually touches it and it does not change fully.In all, this mug is fantastic IF you treat it like super delicate and fine china.Don't wash it in super hot temperatures or with a scratchy/brand new sponge, don't scrub at it too long on the outside AT ALL as one quick soapy and soft swipe should be fine. Treat this like a display, even if you use it a lot.

The handle on the original mug I got for my son, fell off about a month ago. He had the mug for 15 years and just loved it. In High School, he went on dinosaur digs in New Mexico for college credit. I was so pleased to give him a new one for his birthday.

First cup I got had a broken handle from not having good packing. This replacement looks good... BUT, I got it for my grandson (11 yrs) and tried it with hottest tap water... it didn't even begin to change. It needs boiling water so it may not be a great option for kids. Very nice artwork even if it doesn't change!

Hubby put it in the dishwasher. Image is a thin coating, like plastic wrap, which shrank and peeled in the dishwasher. But, of course, they tell you not to do that! But we all love it so much we bought a second to replace it.

My wife received an under-the-sea heat changing mug for her birthday and without any idea which one of us - her, the non-coffee cup using person or me, the daily brewer - used it or who could possibly have placed it erroneously in the dishwasher but what can be said for certain and without doubt is that it was completely ruined. In spite of not being able to clearly determine fault for this horrible crime I decided to purchase two heat changing in order to, again without admitting any inherent fault, aid her in lowering the level of husband-directed anger.This was one of them and she absolutely loves it. Luckily, it arrived before I was found with shards of her ruined mug extruding from my still-pulsating jugular without any clear fault, of course. It turns out that the 98.6F temperature of my blood is indeed enough to elicit the change, sadly it is much slower than coffee so I ended up much more pale that intended but suffice to say with the blood from the cheek cuts wasn't quite enough so now I have some handsome scars on my neck too. She says they will heal nicely and I'll finally look like a man. Maybe. She did add the maybe.