






🛡️ Sip Smart, Spill Less – Elevate Your Stanley Game!
The Silicone Spill Stopper Set by DUNLAGUE offers a leak-proof, 360° spill protection system compatible with Stanley Quencher H2.0 30oz & 40oz tumblers. Made from food-grade, odorless silicone, this set includes round and square stoppers plus straw covers to prevent spills and dust contamination. Dishwasher safe and backed by a lifetime warranty, it’s the perfect upgrade for professionals who demand both style and function in their hydration gear.













| Material | Silicone |
| Color | Mist |
| Brand | DUNLAGUE |
| Style | Casual |
| Item Weight | 1.16 Ounces |
| Shape | Round, Square |
| Number of Pieces | 6 |
| Is Dishwasher Safe | Yes |
| Is Microwaveable | No |
| Manufacturer | DUNLAGUE |
| Part Number | SS-31 |
| Item Weight | 1.16 ounces |
| Product Dimensions | 1.1 x 1.1 x 0.62 inches |
| Item model number | SS-31 |
| Size | 2Pack |
| Finish | Non Stick |
| Pattern | Solid |
| Item Package Quantity | 2 |
| Special Features | Leak Proof, Spill Proof |
| Included Components | 2*Round Stopper, 2*Square Stopper, 2*Straw Cover |
| Batteries Included? | No |
| Batteries Required? | No |
| Warranty Description | Lifetime Warranty |
L**C
Good quality seal set
I adore these stoppers. They fix what the premium cup “brand” couldn’t or wouldn’t. Stops all leaks. Fit well. Works well. Nice color.They will create a much stronger suction when drinking from the straw. I use a silicone straw and will gently press the straw away from the seal wall in order to let a small amount of air flow through to help offset the internal pressure.These seals are awesome.
A**R
Great for on the go or kids
Picked these up for my daughter because she had a bad spill with her Stanley , she finds these to be well made they stop any leaks so they work well. Fit her lid and straw like a glove and make it a little more water tight
B**
No More leaks
Ever since I got my Stanley I had the problem of it constantly spilling. I can't put it in my backpack because it can't fit in the side and if I put it into the actual backpack it might mess up my work so I had to keep it out of my backpack and it would constantly spill in class or when I would walk with it and it was extremely annoying. I got this to aid with that problem and it works really well. I can completely turn the cup over and not a single drop comes out. The stopper might look too big for the whole but trust me it goes in there and it's pretty snug. My straw stays completely still too. The only thing I don't like about it is that they're isn't any designs available for the straw topper but the good thing is that I can take my existing straw topper and use hot glue to put the design on. Would definitely recommend and would definitely buy again if needed.
K**A
Good quality
They look exactly like pictured the part that covers the straw is kind of thin. It does a good job at helping not to leak for the Stanley lids but mine still leaks a very small amount. Highly recommend especially for the price.
K**S
Great Product
Buy this Stanley no-leaking lid! It’s the perfect size and truly works as described. I was about to throw away my Stanley because I couldn’t stand the leaking. This product was my last ditch try and it WORKED!
A**L
great product!
my stanley does not leak anymore and it came with instructions. definitely worth the price.
S**S
Nice color
Works well and well made!
R**H
Good…but not convenient?
How do I put this, I think it seals the cup way too well that makes it really hard to suck the water up from the straw…
Trustpilot
2 weeks ago
1 month ago