Just bought these and they DO NOT keep liquids cold. I filled with ice and then topped with water. Within 3 hours, there was no ice left, water was room temp. Thought weird, so I tried again the next day. The cold was coming right through the outside of the cup, and the ice melted quickly. No insulation. Will be returning.

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!!!

I've bought at least 15 Reduce tumblers! 5 were gifts because we love them so much! We use the Reduce insulated metal lids on most of them. We have the older Big 50oz tumblers that don't fit in any cup holders but they are wonderful for big slushes! The insulated lids fit these & they are very hard to knock over. BTW- the insulated lids have NEVER leaked a drop! We don't have the NEW 50oz tumblers but I'd love to try them! But my husband won't be to happy if I buy more tumblers. Thank you "Reduce"

Love it, keeps drink cold all day!

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

great quality and stays cold for hours

Keeps my water cold along time

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

Great Item must get back in store. I have friends that would love this item.