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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☕ Elevate your daily brew with style and performance.

BPA FREE SPLASH PROOF LID - Sip confidently with a secure, straw-friendly seal.
POWDER COATED NAVY FINISH - Sleek, sweat-proof grip that fits perfectly in your car cup holder.
PREMIUM 18 8 STAINLESS STEEL - Rust-proof, lead-free durability that lasts a lifetime.
DOUBLE WALL VACUUM INSULATION - Lock in your perfect sip—hot or cold, all day long.
LIFETIME WARRANTY SATISFACTION - Invest in quality backed by a no-questions-asked guarantee.

The SUNWILL Travel Coffee Tumbler is a 20 oz insulated stainless steel mug featuring double-wall vacuum technology to keep beverages hot for over 6 hours and cold for up to 24 hours. Crafted from premium 18/8 304 food-grade stainless steel, it offers rust-proof durability and a sweat-proof powder-coated navy finish. Designed with a BPA-free, splash-proof sliding lid, it ensures easy sipping and leak resistance. Perfectly sized for car cup holders, this tumbler comes with a lifetime warranty for guaranteed satisfaction.

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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Brand	SUNWILL
Color	Powder Coated Navy Blue
Product Dimensions	8.56 x 8.56 x 17.15 cm; 326.59 g
Capacity	20 Fluid Ounces
Material	Stainless Steel
Special Features	Leak Proof, Break Resistant
Item Weight	327 g

SUNWILL Travel Coffee Tumbler 20 oz, Insulated Mug with Lid, Stainless Steel Cup for Outdoor, Powder Coated Navy

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