Car Cup Holder Expander for Large Water Bottles - Meet the Dug Dock

Your bottle is massive and your standard 1987 car cup holder design, fits a can of Fanta. They've invented AI but we still can't get a decent sized cup holder for the car. You could go smaller, but when you crush water like you do, you need at least 1.1L.

The Dug Dock is the car cup holder expander you're looking for, expanding your standard holder up to 130mm. Which means your favourite 1.1L mate or 2L Big Unit now rides shotgun no problems.

Your Cup Holder Is Living in the Past

Cup holders were designed when a 600ml Coke was considered hydration.

Meanwhile in 2026, we're juggling bottles in the car, just trying to stay properly hydrated, it's crazy. If you're running a 1.1L or 2L Dug to work every day, you already know the drill. Trying to reach for that bottle can be a nightmare when driving.

Standard car cup holders max out around 80-90mm in diameter. Dug's 1.1L Little Mate is 90mm; 2L Unit is 120mm and the 4L Dug Jug is 160mm. Do the maths.

This is where the Dug Dock is a winner. It sits inside your existing cup holder, expands outward, giving large insulated bottles a proper home for the drive. It's a no brainer.

What Is a Cup Holder Expander?

A car cup holder expander is an insert that sits inside your standard car cup holder. It creates a wider, more stable base for larger bottles, mugs, or tumblers.

Most standard cup holders fit cans and small takeaway cups. That's all good if you're living in the past. For everyone running serious hydration in 2026, it's a problem.

The Dug Dock opens to a minimum 130mm internal diameter. It grips the 2L One Big Unit comfortably, and stops your bottle becoming a projectile every time you hit a speed bump.

Who Actually Needs One?

Tradies.

You're not stopping for water every hour on a job site. Well, you might have been before you met Dug, let's face it. These days, you've invested in a Dug and it needs to go somewhere in the ute that isn't the floor. The Dug Dock keeps it within arm's reach without bouncing around the cab all day.

Gym crew.

You've done a 6am session and your 2L is rolling around the passenger seat like it's leg day and can't stand straight. The Dug Dock sorts that out.

Long commuters.

Forty-five minutes each way. A loose bottle is an accident waiting to happen. Get it sorted before it sorts itself out on the Monash.

Parents.

You've got enough going on without having to worry about getting a sip.

Will It Fit My Car?

Most standard Australian passenger vehicles have cup holders between 70-90mm in diameter.

The Dug Dock design, fits the majority of hatchbacks, sedans, SUVs, and utes. If your car has shallow or narrow cup holders, measure first. But for most Australians in most cars, you're going to be fine.

What Happens When You Don't Bother

You could keep wedging your bottle between the seat and the centre console. Plenty of people do.

But you know how that goes.

The bottle tips when you brake and water goes everywhere.

You're fishing around for it at the lights. The lid catches and opens. Same result, wetter outcome. The bottle scratches your interior and then you feel a bit sad about it.

A cup holder expander for under $20 to fix a problem you've been living with every single day, is a done deal. That's a parma and a pot - It's less than a shout.

The Dug Dock and Your Mate Dug

The Dug Dock is designed around My Mate Dug bottle dimensions. Paired with the 2L One Big Unit, you've got the full car setup. A bottle that stays cold for 48 hours and actually stays in your cup holder.

The 500ml Little Unit is already 70mm, so it fits most standard holders without the Dock. The 1.1L and the 2L Dug bottles fit no dramas.

The Dug Dock has the bonus side can sized holder too. So you can still get the can of Coke Zero or whack your coffee there without any hassles.

Coming Soon

So we're here to let you know, the Dug Dock is launching August-September 2026. It's just before the hectic extra hot months and conveniently before the Chrissy season. Yep, we are smarter than the average bear. Jump on the mailing list and you'll be first to know when it drops.

In the meantime, make sure to check out all the other goodies in the accessories range. Replacement lids, the Dug Boot silicone protector, Ice Rocks and Cups. All the good stuff.

FAQ

What is a car cup holder expander?

A car cup expander is an insert that fits into your standard cup holder and widens it to fit larger bottles, mugs, or tumblers.

Built for people who get seriously thirsty and prefer an easy sip. It's better rather than pulling a yoga move to get their bottle from the floor of the car.

What size bottles does the Dug Dock fit?

The Dug Dock opens to 130mm, which fits the 1.1L and 2L comfortably. The 4L beast stands up on its own and is best on the floor anyway.

Will it fit my car?

Most standard Australian vehicles have cup holders between 70-90mm. The Dug Dock fits the majority of hatchbacks, sedans, SUVs, and utes. Check your cup holder dimensions if you're unsure.

When is the Dug Dock available?

Launching August-September 2026. Get on the mailing list at mymatedug.com to be first in line.

Does it only work with My Mate Dug bottles?

Let's face it, it will probably fit most bottles you have kicking around up to 13cm wide.

But that's just the kind of guy Dug is. Happy to help out a mate and not get too precious about what bottle is in there. We're just happy you're here...

Even if you're happy with your clapped out, less than stellar, ugly unit that wouldn't hold a torch to old mate Dug. Not bitter at all.