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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Sip in Style! ☕️

BUILT TO LAST - Crafted from premium 18/8 stainless steel, rust-proof and unbreakable.
SLEEK STYLISH - Powder-coated finish for a sweat-proof, easy-grip experience.
STAY HOT STAY COLD - Double-wall vacuum insulation for ultimate temperature control.
SPLASH PROOF SIPPING - BPA-free sliding lid with a drink hole for mess-free enjoyment.
CUSTOMER CENTRIC CARE - Lifetime service guarantee for your peace of mind.

The SUNWILL 20oz Tumbler is a premium stainless steel travel mug designed for durability and performance. With double-wall vacuum insulation, it keeps beverages hot for over 6 hours and cold for up to 24 hours. The tumbler features a sleek powder-coated finish, a splash-proof sliding lid, and is made from high-quality, eco-friendly materials. Perfect for on-the-go professionals, this tumbler is both stylish and functional.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

€ 80.67

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Brand	SUNWILL
Colour	Powder Coated Black
Special Feature	Break Resistant
Style	Modern
Theme	Sports
Recommended Uses For Product	Travel
Included Components	Lid, Straw
Shape	Tumbler
Pattern	Solid
Product Care Instructions	Hand Wash Only
Age Range (Description)	Adult
Reusability	Reusable
Net Quantity	1.0 count
Item Weight	0.72 Pounds
Number of Items	1
League	ncaa
Manufacturer	1
Size	20 oz 1 Pack
Country of Origin	USA
ASIN	B07STJ9PTF

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

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