Mug Buyer Beware — 1-2★ Warning Reviews
20 most helpful negative reviews — real warnings from real buyers
Mug Buyer Beware — Top 1-2★ Warning Reviews
Real negative reviews ranked by helpfulness. These are the most useful warnings from actual buyers.
Ember Temperature Control Smart Mug, 10 oz, 1-hr Battery Life, Black - App Controlled Heated Coffee Mug
⭐⭐ (2/5) | ⚠️ Unverified | 1441 found helpful | 2017-12-20
Original Review:
Simple to use right out of the box, and the app is not necessary if you’re satisfied with keeping tea warm at the default 130F, as we were. Keeps a charge for about 90 minutes before needing to go back on the charging plate; battery life seems shorter than it should for a product in 2017, but it was working fine for a…
YETI Rambler 20 oz Stainless Steel Vacuum Insulated Tumbler w/MagSlider Lid
⭐ (1/5) | ✅ Verified Purchase | 1050 found helpful | 2017-09-19
Counterfeit piece of junk! The rambler pictured shows the magnetic slider lid. The rambler I received shipped from China and came with a cheap piece of plastic lid with no magnetic closure. I do not believe the tumbler is even vacuum sealed as hot coffee turns cold in a matter of minutes.
Contigo Steel Travel Mug, 24 oz, Stormy Weather
⭐ (1/5) | ✅ Verified Purchase | 992 found helpful | 2018-07-31
A travel mug has two functions: while we mostly care about it keeping our coffee hot during our commute, we often oversee a travel mug’s fundamental role of containing the hot liquid within it as you transport it.
Contigo West Loop Stainless Steel Vacuum-Insulated Travel Mug with Spill-Proof Lid, Keeps Drinks Hot up to 5 Hours and Cold up to 12 Hours, 16oz Black
⭐⭐ (2/5) | ✅ Verified Purchase | 777 found helpful | 2015-02-08
We’ve owned several other Contigo models and have been very pleased. This is the first time we bought one that’s not with brush aluminum finish, and I’m afraid that it will be the last. The blue paint is peeling badly with less than two months of use.
Contigo West Loop Stainless Steel Vacuum-Insulated Travel Mug with Spill-Proof Lid, Keeps Drinks Hot up to 5 Hours and Cold up to 12 Hours, 16oz Black
⭐ (1/5) | ✅ Verified Purchase | 776 found helpful | 2017-05-15
High chance of mold in the lid around and under the spring and behind the flap. Very hard to fully clean. Do extreme cleaning on this, we never noticed the hidden mold and have been sick and feeling horrible for a few weeks. It doesn’t disassemble enough to clean all the way. We would wash them daily.
YETI Rambler 20 oz Stainless Steel Vacuum Insulated Tumbler w/MagSlider Lid
⭐ (1/5) | ✅ Verified Purchase | 750 found helpful | 2018-09-20
I received my Yeti 20oz with Mugslider lid. Looks great, well built. But after a hour or two, coffee is cold. While driving, the coffee will leak past the lid, and proceed to drip, all over your cars interior. I was hoping for something better.
YETI Rambler Stainless Steel Vacuum Insulated Colster
⭐ (1/5) | ✅ Verified Purchase | 681 found helpful | 2017-03-25
The Colster I received did not have laser etching on the bottom like a genuine one. It did not include the can or sticker or mini catalog. It weighs less than an authentic Colster. The label has several spacing errors, frostbit is misspelled, The logo on the lid is clear on the genuine one, but not on the fake one.
LifeSky Stainless Steel Insulated Travel Coffee Mug, Double Wall Vacuum Insulated Water Bottle, BPA Free Flip Cap for 1-Hand Operation 16 oz (Champagne)
⭐⭐ (2/5) | ⚠️ Unverified | 666 found helpful | 2015-12-31
I’m not sure how long it keeps you liquids hot or cold because the way the lid is designed it hits you in the face before you can tilt it high enough to drink.
Stanley Classic Trigger Action Travel Mug 16 oz & 20 oz –Leak Proof + Packable Hot & Cold Thermos – Double Wall Vacuum Insulated Tumbler for Coffee, Tea & Drinks – BPA Free Stainless-Steel Travel Cup
⭐ (1/5) | ✅ Verified Purchase | 575 found helpful | 2018-03-10
I hate to do this because this is truly my all time favorite coffee cup. It never leaks, it keeps hot for hours, it’s durable….except for this one very important part. I bough the first one from a brick and mortar store. After a few weeks the button popped off, exposing the spring. It appears to be press fit.
Contigo West Loop Stainless Steel Vacuum-Insulated Travel Mug with Spill-Proof Lid, Keeps Drinks Hot up to 5 Hours and Cold up to 12 Hours, 16oz Black
⭐ (1/5) | ✅ Verified Purchase | 466 found helpful | 2018-02-07
I really like everything about this mug so I bought 2 more for other members of my family. They worked great for a while. But now a year later, 2 of the 3 have lost their vacuum and no longer keep beverages hot or cold for very long. So I figured it’s just a manufacturing defect and they will replace.
Ember Temperature Control Smart Mug 2, 10 Oz, App-Controlled Heated Coffee Mug with 80 Min Battery Life and Improved Design, Black
⭐ (1/5) | ⚠️ Unverified | 410 found helpful | 2019-11-12
Don’t get me wrong, when my girlfriend gifted me this Ember mug I quickly went from skeptical to hooked. Having a perfectly hot sip every drop of the way down became something I craved. But then, it stopped working. I had it replaced. And then it stopped working again. And then, customer support just stopped responding to me.
Contigo West Loop Stainless Steel Vacuum-Insulated Travel Mug with Spill-Proof Lid, Keeps Drinks Hot up to 5 Hours and Cold up to 12 Hours, 16oz Black
⭐ (1/5) | ✅ Verified Purchase | 400 found helpful | 2019-01-29
Purchased this set of cups. One of the lids had an obvious manufacturer defect, as it broke off at the rim right where the “push to clean” button is. This caused the lid to leak, which is a potential burn hazard if the cup contained a hot beverage.
Contigo Steel Travel Mug, 24 oz, Stormy Weather
⭐ (1/5) | ✅ Verified Purchase | 393 found helpful | 2017-08-20
For the first 4 months, this was my go-to. It kept the coffee hot and didn’t leak. The inside plastic washer that keeps the lid from dripping began to fail and a leak developed, resulting in several stained shirts. The only fix is a new washer which I will attempt to secure. Had this product lasted a year, I would have been greatly satisfied.
YETI Rambler 20 oz Stainless Steel Vacuum Insulated Tumbler w/MagSlider Lid
⭐ (1/5) | ✅ Verified Purchase | 359 found helpful | 2017-09-14
Came with two lids, but neither was the magslider and both were cracked. Overall, pretty unsatisfied.
THERMOS Stainless King Vacuum-Insulated Travel Mug, 16 Ounce, Black/Red
⭐ (1/5) | ⚠️ Unverified | 340 found helpful | 2015-02-06
Best mug I’ve found for keeping coffee hot, but the painted finish on these things starts flaking off within a few weeks. I solved this with one of them by using a heat gun to remove the paint.
They’re not inexpensive–for the price of these mugs, this is an inexcusable defect. See my photo below of three of our mugs.
JURO Tumbler 20 oz Stainless Steel Vacuum Insulated Tumblers w/Lids and Straw [Travel Mug] Double Wall Water Coffee Cup for Home, Office, Kitchen Outdoor ideal for Ice Drinks/Hot Beverage - Marble
⭐ (1/5) | ✅ Verified Purchase | 317 found helpful | 2019-10-28
[[VIDEOID:825447d6c78ffb422ba00a1fbdd4a216]] I really wanted this to my new go to travel cup for hot and cold. I love the quality of the cup inside and out. It’s beautifully designed and you get 2 lids with it. But I had to send it back.
Here’s why.
Ember Stainless Steel Temperature Control Travel Mug 2, 12 Oz, App-Controlled Heated Coffee Mug with 3-Hour Battery Life and Improved Design, Black
⭐ (1/5) | ✅ Verified Purchase | 315 found helpful | 2019-12-31
My wife loves drinking tea, so I bought this for her for Christmas. Six days later, we’re returning it. Why?
1. It’s not an actual thermos. If you put hot water in a regular glass cup, you’ll get the same level of thermal insulation. To test this, she put some tea in a regular thermos and some in the smart mug.
Ember Temperature Control Smart Mug 2, 10 Oz, App-Controlled Heated Coffee Mug with 80 Min Battery Life and Improved Design, Black
⭐ (1/5) | ✅ Verified Purchase | 304 found helpful | 2019-12-13
Read reviews on app reviews–1.7 stars. That should tell you not to waste you money. I doesn’t work or at best works intermittently. Read the warranty. That will also tell you not to waste your money.
Contigo West Loop Stainless Steel Vacuum-Insulated Travel Mug with Spill-Proof Lid, Keeps Drinks Hot up to 5 Hours and Cold up to 12 Hours, 16oz Black
⭐⭐ (2/5) | ✅ Verified Purchase | 297 found helpful | 2015-08-15
This was my 2nd generation purchase of a pair of Contigo Mugs from Amazon. The first purchase was based on my satisfaction with a Contigo mug that I won as a door prize at a charity event, and in Jan 2014 I bought the two mugs to replace that one (when I left it in a classroom where I made a presentation - the teacher laughed when I asked if the…
YETI Rambler Stainless Steel Vacuum Insulated Colster
⭐ (1/5) | ✅ Verified Purchase | 296 found helpful | 2016-08-12
Fake Product from Wholesale Cup.
This is a well-made fake. They may have even come from the same factory before the serial numbers are etched into the bottom. However, they are not authentic merchandise and that is why I’m leaving this review.
Reviews reflect user opinions. Every product has both positive and negative reviews — use your judgment.