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"

I love these tumbler's, I have many types for drinking tumblers but these at the best yet. !!! They keep water cold for days, I live in a desert area where 110 degree temps are the norm and more, and Ice has lasted for up to 18hours - I have tested it! They fit in my Jeeps cupholder! I have had no issues with leaking from the lid! The straw is a little bit big/wide, but its really no issue. I have recommended these tumblers to friends and one of them have bought a set!

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.

I used to buy 44 ounce styrofoam cups but have switched to these ginormous things. They are big, heavy, and just barely fit in my car cup holder, and were too for my school bus cup holder, but I've made it work by hooking the handle on something. So why the 5 star rating? My husband made me ice tea yesterday morning at 5:45 am, and when I finished late this afternoon, there were still 3 ice cubes left. I swear this holds my tea colder and longer than is possible by physical law. We have had 80s and 90s degree weather and it's stays cold all day and into the night.

great quality and stays cold for hours

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

Keeps my water cold along time

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

Love it, keeps drink cold all day!

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!