Looking for a mug with a secure lid that doesn't leak....has anyone who has purchased this cup had issues with leaking?

I hope someone talked you out of this mug. The lid does NOT screw on, so when a hot beverage is in the mug, steam builds up (because you have the lid all closed to prevent spillage) and bam! Off flies the lid spilling very hot drinks! With cold drinks there is no problem. The lid is secure. In fact it is hard to remove unless you open the drinking part for air to release the suction!

How many ounces of liquid will the 20 ounce tumbler actually hold?

It holds only 16 ounces! With the lid in place, 16 ounces of liquid comes right up to the bottom of the lid. I did measure it with a measuring cup (twice) just to be certain. It will hold 20 ounces only if you fill it right to the rim. This seems to be the case with EVERY stainless steel insulated tumbler available for sale under every brand I have tried, and it's very aggravating. I'd like to find an insulated tumbler that actually holds 20 oz. with the lid on!

Does this have a non slip silicone base?

No it does not but I like the cup.

Do yeti lids (with the magnet slider) fit this tumbler?

The Yeti mag lids do fit this tumbler. I prefer the magnet lid as its easier to clean. You can purchase separately (either Yeti or generic). I bought the generic lid and it’s identical except it doesn’t say YETI on the magnet.

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SUNWILL 20oz Tumbler with Lid, Stainless Steel Vacuum Insulated Double Wall Travel Tumbler, Durable Insulated Coffee Mug, Powder Coated Navy, Thermal Cup with Splash Proof Sliding Lid

SUNWILL 20oz Tumbler with Lid, Stainless Steel Vacuum Insulated Double Wall Travel Tumbler, Durable Insulated Coffee Mug, Powder Coated Navy, Thermal Cup with Splash Proof Sliding Lid

Product ID: 419056911

Details

Brand
SUNWILL
Capacity
20 Fluid
Colour
Powder Coated
Included Components
Lid Tumbler
Material
Stainless
Recommended Uses For Product
Home Office

💧Sweat-proof, no condensation

🔥Keeps drinks hot 6+ hrs

❄️Keeps drinks cold 24 hrs

34840CFA

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

☕ Stay hot, stay cool, stay ahead with SUNWILL.

SPILL PROOF SLIDING LID - BPA-free silicone gasket and smooth sliding lid keep spills at bay while allowing easy sipping or straw use—ideal for on-the-go professionals.
CAR CUP HOLDER COMPATIBLE - Designed to fit snugly in standard car cup holders—perfect for busy days, gym sessions, or outdoor adventures without missing a beat.
SLEEK POWDER COATED FINISH - Modern navy blue powder coating resists scratches and fading, offering a stylish grip that stands out in any meeting or café.
ALL DAY TEMPERATURE CONTROL - Double-wall vacuum insulation locks in heat or chill for hours, so your coffee or cold brew stays perfect from morning commute to late afternoon grind.
DURABLE SAFE STAINLESS STEEL - Crafted from premium 18/8 304 food-grade stainless steel—rustproof, lead-free, and built to last through every hustle.

The SUNWILL 20oz Tumbler features double-wall vacuum insulation that keeps beverages hot for over 6 hours and cold for up to 24 hours. Made from durable, rust-resistant 18/8 304 stainless steel with a BPA-free sliding lid, it offers spill-proof convenience and a sleek powder-coated navy finish. Designed for professionals on the move, it fits standard car cup holders and resists sweat and condensation, making it the ultimate travel companion for hot coffee or iced drinks.

Specifications

ASIN	B07MV6Z896
Age Range Description	Adult
Best Sellers Rank	#1,927,246 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #78,090 in Glassware & Drinkware
Brand	SUNWILL
Capacity	567 g
Colour	Powder Coated Navy Blue
Customer Package Type	Gift Box
Customer Reviews	4.4 out of 5 stars 3,378 Reviews
Enclosure Material	Stainless Steel
Finish	Powder Coated
Included Components	Lid, Tumbler
Is the item dishwasher safe?	Yes
Is the item microwaveable?	No
Item Dimensions W x H	8.6W x 17.1H Centimeters
Item Type Name	tumbler
Item Weight	0.72 Pounds
League Name	ncaa
Manufacturer	SUNWILL
Material	Stainless Steel
Material Features	Insulated
Material Type Free	BPA Free
Model number	TravelTumbler
Number of Items	1
Occasion	Anniversary, Birthday, Engagement, Wedding
Other Special Features of the Product	Microwave Safe
OutputCapacity	567 g
Pattern	Solid
Product Care Instructions	Dishwasher Safe
Product Style	Modern
Recommended Uses For Product	Home, Office, Travel
Reusability	Reusable
Shape	Round
Size	20 Ounces
Special Feature	Microwave Safe
Specific Uses For Product	Cold Drinks, Hot Drinks
Style	Modern
Subject Character	Navy Blue
Team Name	mit
Theme	Sports
UPC	670924518426
Unit Count	1.0 Count

Reviews

R**E

I absolutely LOVE this travel mug!

Updated review: I love this cup more today than I did when I first got it. I absolutely love this cup. I use it for hot coffee and I use it for cold beverage. Keeps the hot hot, and keeps the cold cold. Works wonderful either way! The best cup ever. I just LOVE this cup. The first thing I did was fill it with water and then shake it upside down. Not a drop to be seen! The slide to open and close is really smooth and easy. It's clean and classic, just the way I like things. I hope this stands up over time, so we shall see. But for today, I am so happy I bought this little treasure.

8.08.2026

P**K

Good Tumbler, Bad Lid

Tumbler itself is awesome and it works great. Keeps my coffee hot for hours. Looks nice and stainless interior is easy to clean. The issue is the lid. The slide isn't removable, at least not easily. This makes it very difficult to clean under the slide (and you will need to). You can pry it out and snap it back in, but I don't suspect it would last long doing that. It also closes both the drinking portion AND vent, so heat or carbonation could push the lid up and loose (had this happen with a instant latte that has a "foaming" ingredient). If you already bought this one, there are options for lids. I bought some 20oz yeti magnetic style replacement lids and they work perfectly. Size to look for is: 80mm/3.15" interior diameter, 87mm/3.42" exterior diameter, and 22mm/0.9" thick. I'd love to recommend this one, but needing to buy a new lid to go with it kind of kills any value.

6.05.2026

R**6

Perfect for my needs

This fits the coffee cup holder in the car, 20 ounces is perfect for me whether it be coffee or water. I haven’t had any problem with the lid. It keeps beverages hot or cold for a number of hours. I’m very pleased with this.

20.08.2026

D**O

Secure top

I love this cup, especially the top because it is so secure. I also like the color. The only drawback is that there isn't anyway to purchase extra tops.

22.08.2026

N**Y

Works fine

Works as expected, only minor complaint is that it just a bit smaller than I thought it would be!!!!

14.08.2026

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34840CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

Secure transaction

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