Libe it Lagoon go on good and cup is big.No tiene instrucciones para armar las figurasI can't speak to function or durability because this was a mailed gift. But it got glowing reviews by my nievce and was opened and built before other gifts.I chose it for the unique pieces and am happy with the choice.This is a fun idea. We live in the mid-west where winters are cold and kids love hot chocolate/cocoa. This is NOT the solution. We did not run my daughter's mug through the dishwasher knowing it wasn't a fancy mug. The mug sat in the sink and managed to get liquid between the inner and outer walls. Letting it sit upside down for a day or two allowed the liquid to leak out but it wasn't ideal. If you want it for more than a fun mug to decorate then I would suggest getting a normal mug/coffee cup.On the positive, because it isn't all bad, the pieces that came with it were interesting and fun. My daughter enjoyed the pegasus as it wasn't something in a normal Lego set. She also enjoyed being able to put pieces on the outside and make it pretty. It would make for a great shelf display or pencil/pen holder on a desk.To drink water out of,she loves the legs that it came withThis is a very cute gift for a kid (age 4 was my niece). She loved this. Although a 4-yr old won't notice some of the smaller things like 1) pieces didn't always fit on the cup; 2) pieces didn't make so sense at all being in that bag and seemed very useless; 3) the hat for the little person on the unicorn never fit and snapped in place; I think it's a bit over priced due to these features - BUT for a 4yr old, to see a unicorn on their cup, was fun enough. Good build-quality for the cup - I'm not sure what "warmth" is for the rating - but its sturdy. I just wished it came with pieces that actually made sense and didn't feel like a complete waste; and that they actually fit together to make something real - not just bricks - and not evrything sticks to the mug because it felt like two separate systemsI purchased this for my 10 year old granddaughter who we call “The Lego Master.” She was thrilled putting it together and being able to drink out of it and hand wash it. I would recommend it. It’s is a good value purchase and cute.I got the pink lego mug with pegasus and a girl lego person with a unicorn helmet. My niece loved it. It is great only problem is it cant go in the dishwasher but that is a small problem. I just dont put anything too sticky in it unless you wash with soap and hot water by hand right away. It is very giftable!