How long does it keep drinks hot?

Vacuum-sealed double-wall bottles of this type hold heat for several hours, roughly 6 to 12 depending on fill level and outside temperature. Cold drinks stay cold a similar time.

Is 270ml enough for a day of skiing?

It is about one large cup, enough for a coffee break or a short outing. For a full day on the mountain, plan on refilling or carrying a second bottle.

Is it dishwasher safe?

The stainless body is best washed by hand to protect the coating and the vacuum seal. The plastic lid should be rinsed by hand and left to dry open.

Does it fit standard cup holders?

At 270ml it is slim enough for most car cup holders and backpack side pockets. Check the diameter if your holder is narrow.

Is it worth it over a plain stainless bottle?

You pay for the Moncler Grenoble name and finish. Plain vacuum flasks of the same size insulate just as well for far less, so buy this for the look and the brand, not the performance.