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

BUILT TO LAST - Premium 18/8 304 stainless steel resists rust, dents, and everyday wear.
THERMAL MASTERY - Double-wall vacuum insulation locks in temperature—hot or cold, all day long.
VIBRANT DURABLE - Powder-coated finish resists scratches and fading, adding style to your daily grind.
ON THE GO ESSENTIAL - Ergonomic design fits car cup holders and your active lifestyle seamlessly.
SPILL PROOF CONFIDENCE - BPA-free sliding lid with silicone gasket ensures no leaks, just smooth sipping.

The SUNWILL 20oz Tumbler duo combines cutting-edge double-wall vacuum insulation with premium 18/8 stainless steel to keep your beverages hot for over 6 hours or cold for up to 24 hours. Featuring a BPA-free, spill-proof sliding lid and a durable powder-coated finish in trendy teal and coral, these tumblers are designed for professionals on the move—perfectly fitting car cup holders and built to withstand daily adventures without sweating or rusting.

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Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

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Brand	SUNWILL
Special Feature	Microwave Safe
Style	Modern
Theme	Sports
Recommended Uses For Product	Beach, Camping, Coffee, Drinking, Home, Ice Cubes, Office, Outdoor, Travel
Included Components	Lid, Tumbler
Specific Uses For Product	Cold Drinks, Hot Drinks
Shape	Round
Pattern	Solid
Age Range (Description)	Adult
Material Feature	Insulated
Cartoon Character	Teal & Coral
Reusability	Reusable
Material Type Free	BPA Free
Number of Items	2
Team Name	mit
League	ncaa
Customer Package Type	Gift Box
Finish Type	Powder Coated
ASIN	B07Q2C4F3X

SUNWILL 20oz Tumbler with Lid (Teal & Coral 2 pack), Stainless Steel Vacuum Insulated Double Wall Travel Tumbler, Durable Insulated Coffee Mug, Thermal Cup with Splash Proof Sliding Lid

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