I put ice and water in this and 4.5 hours later even after leaving it in a hot car for over an hour, I still had ice and water. That is pretty impressive. This fits into a car cup holder even though it looks like it won't. This is ONLY for cold liquids not hot. I like the auto close feature too, it saves a lot of fumbling around.
Later: I decided to see how long this would keep ice in water without the ice melting completely. Over 24 hours after I filled the bottle with ice and water, there was at least 50% of the ice left. That is pretty darn amazing.
From the vendor:
Our Lids Are Sealed - AUTOSEAL technology is leak and spill proof (Yes, there is a difference!)
For the Long Haul - Drinks stay cold up to 28 hours with Thermalock Vacuum Insulation
Carry On - Carry handle for easy transport
Cleaner Drinking - Spout cover to help keep out gross dirt and germs
Lend a Hand - Easy one-handed drinking with the push of a button; Clean Up - Top-rack dishwasher safe lid, hand wash body
If reviewing a product, it may have been received free of charge. That will NEVER have a bearing on my recommendations.