This cup works great at keeping drinks cold. The ice stays in there all day, even out in the heat, or if left in the car. The size of the cup is also great, and I love that it fits in the cup holder of my jeep. It's great when working outside or laying by the pool or at the beach. The cup is heavy, even before filling it up. After a day of using it, my elbow began to hurt, and I did not realize why until the next day when I filled it up with ice and water to use again and picked up the cup which started the elbow pain again.

My wife and I ordered a 2-pack of these cups for their larger size and ability to be used in cup holders. When the order arrived, one of the straws was cracked. No big deal, I emailed Reduce customer service, and after a few days of back and forth confirming information, I was advised that they would ship a replacement. Much to my surprise, they had mailed an entire new cup and not just the straw.

The older version of these without the handles or colors were MUCH better. The handles get in the way, are not removable, and they changed the design of the bottom so that they are less stable. The old ones had flat bottoms without the bevel. They were also just plain stainless, so no paint to chip. Unfortunately it seems that Reduce doesn't make the old ones any more, only these. Buy the old ones without the handle if you can find them at a decent price......

We were searching for a larger, insulated mug for a while before coming across this item. Something to upgrade the metal tumblers we'd been using but refilling too often. This mug at 50oz fixed that! Lots of pluses beyond that, though. The tapered bottom fits both the large and small cup holders in my Hyundai. The inner measurement markings aren't much use to me but are nice to have I guess. I thought the handle might be burden and kinda hoped it was removable, but it's turned out to be a non-removeable blessing, very durable and functional. Speaking of durable, the included straw is nice and solid with a larger diameter than most drinking straws. The bottom's rubbery grip is great, and I haven't seen the thing sweat a drop. I didn't clumsily knock it off the table this week-- no leaking, no dent! I've seen a couple concerns about the thermal time, but haven't had an issue with that. My water stayed cold, ice didn't seem to melt much water being in the car for several hours on a 100° day. It's held over overnight as well. Can't really confirm or deny the 50 hour claim as drinks don't last that long with me. But I can say at $15 a mug, both me and my girlfriend feel like this was a helluva deal!!!

Love it, keeps drink cold all day!

Keeps my water cold along time

great quality and stays cold for hours

Nice cup, holds ice well. I love that it’s big and fits in my cup holder.

wouldn't keep water cool for more than a few hours. Returned it

I’ve had these just a couple days now and love them! Love that it’s 50oz and fits in cup holder, I fill mine with ice and water before leaving for work in the morning around 7:00am and I still have ice when I leave at 5ish, great purchase!