Big tumbler. Check the bottom.
Yes, the 40 oz
Quencher H2.0 fits.
It’s the base size that matters, not how much your tumbler holds. The 40 oz Stanley Quencher H2.0 has an owner-confirmed snug fit.
| 40 oz Stanley Quencher H2.0 | ✓ Confirmed snug fit |
|---|---|
| Base 2–3 inches across | Standard fit range |
| Base over 3 to 3.15 inches | Snug fit range |
| Base wider than 3.15 inches | Not a fit |
Check handle clearance, too. Remove any added boot before measuring. A brand name or ounce size alone does not establish fit.
Before you choose
A few good questions.
Will it fit my 40 oz Stanley?
Yes: the 40 oz Stanley Quencher H2.0 is owner-confirmed to fit snugly. Other models and sizes can have different bases. Measure the bottom of your drinkware: 2–3 inches is the standard range, with a snug fit up to 3.15 inches. A low handle or an added boot can interfere.
How is this different from a tumbler boot?
Steadi widens the footprint supporting your drink. Its six flexible fins grip the lower part of the container, while the broad base puts the tipping edge farther out. A protective boot mainly follows the shape of your tumbler’s existing base.
Does Steadi make my tumbler spill-proof?
No. Steadi helps resist tipping; it does not seal your lid or make a drink impossible to knock over. Keep the whole base supported, away from edges, and use a suitable surface. The actual container, fill level and placement affect the result.
Does it stay on when I pick up my drink?
The fins grip a compatible container so Steadi can travel with it. Fit varies by base shape. For a snug tumbler, hold Steadi and gently work the tumbler free when you want to remove it.
Is it a car cup holder adapter?
Steadi is a freestanding base for setting your drink down. It is not an adapter designed to fit inside an existing car cup holder.
How do I clean it?
Rinse or wipe it clean, or put it in the dishwasher. Steadi is made from TPU, not silicone.
What comes in my order?
The number of Steadis and colors you choose. Your tumbler, cans and other drinkware are not included. You can match your set or mix individual colors in the picker.
How soon will it arrive?
Orders ship from Orange, California within 1–2 business days. Standard U.S. shipping is free; delivery typically takes another 3–5 business days after shipment. Timing is a carrier estimate.
What if it is not right for me?
Your order has a 90-day, 100% money-back guarantee. Used products are eligible, and U.S. return shipping is free. Contact Steadi Labs to start a return. See the full returns policy for instructions.