What Is Stackables?

The ULTIMATE, Customisable Chewing Experience

Stack as many as you need. Get a personalised chewing experience with Stackables - giving you more control over your chewing experience. Each pack contains 20 grams of medium to very tough mastic gum crystals for a customised chewing experience.

Our Story: How We Ended Up Selling Tough Mastic Gum...

Mastic was chewed by cavemen back in the day - picture a caveman...did you visualise a man with a sharp, sword-like jawline? I did too.

So what happened between then, and the present day?

That question bugged me until I learned that so much had changed....

The Food Dilemma 

Food has gotten softer over the years as it has become more desirable, which has caused atrophy of our facial structures.

This has caused our jaws to adapt to softer foods, meaning our jaws are no longer required to be big and strong - therefore, our jaws have become smaller and our bite force weaker over time. 

What do liquid diets, meal replacements, and smoothies have in common? 

Let's not lie - all three taste great, but they fail to activate the masseter muscles located in your jawline....

When our facial muscles are not used enough, just like when you stop going to the gym, our muscles begin to shrink - and our jaw muscles are not exempt from this rule...

This is why it is important to apply resistance to our jaw muscles - to prevent atrophy of our masseter muscles...and that is where mastic gum steps in. 

Stackables contain medium to tough crystals, ensuring that you get the perfect chew each time. It is reusable, never dissolves like regular chewing gum, and is naturally sugar-free!

And That's Not All....

Mastic gum is 100% natural, great for your gut & digestive health, prevents tooth decay with it's anti-microbial properties, and even eliminates onion and cigarette breath. 

The Fix? Let's Travel Back In Time...

We must re-activate our masseter muscles - that's where mastic gum steps in. To restore jaw strength and structure, Stackables is ideal for masseter muscle (jaw muscles) resistance training, since it is 8-10x tougher than regular chewing gum. 

This is ample force for jawline development, improving bite force, and maintaining good tongue posture. 

Mastic gum was their secret, and now it is yours too!

The Difference: ROCKJAW vs Other Brands

We spend hours hand-picking and hand-packing EACH & EVERY individual mastic gum crystal selecting tough crystals for your jawline - these are the ones that end up in your pack of Stackables to ensure you get the highest quality product.

There's a LIMITED SUPPLY DROP, every month.

We're the ONLY BRAND that handpicks each & every crystal, and this effort is reflected in our prices, including the high price of sourcing mastic gum. Due to the rarity of hard mastic gum, we produce a very limited number of units of MAX Edtion per month.

We also donate a portion of our sales monthly to help support global disasters.

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Stack as many crystals of ROCKJAW as you suit and chew for 30 mins - 2 hours a day. 

Be sure to chew evenly on both sides, taking breaks.

Stack as many ROCKJAW crystals as you desire and chew for 30 mins to 2 hours daily. Ensure even chewing on both sides, taking short breaks.

Just like any muscle, consistency is key to maintaining and developing your masseter muscles for that striking jawline. It is important to continue working your jawline muscles for long-term results.

Stack With Mewing Exercises:

Mastic gum is recommended by Dr. Mike Mew (a British orthodontist that developed mewing), as one of the best ways to exercise the jawline.

For optimal results, try ROCKJAW MAX with mewing exercises to help improve facial structure further, whilst improving tongue posture and breathing.

Not sure how to mew? Head over to the mewing experts at mewingpedia.com

Storage Guide:

Mastic gum has a low melting point. Please keep refrigerated or in the freezer when possible.

Alternatively, store in a cool place away from heat sources and direct sunlight. 

Choking hazard, store away from children under the age of 10.

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Since we hand-pick and pack the Stackables range, it takes us slightly longer to ship. Please be patient as we work hard to process your order.

The estimated pick to ship time is 1-4 working days, but may be slightly longer during peak seasons.

For international orders, we highly recommend opting for a tracked service to prevent delays.

Please double check to see if your address is correct & that no key information is missing before checkout.

Processing Times

All orders are processed within 1-5 working days (excluding seasonal holidays and delays). Please note that our hand-picked products are processed as ordered and may take slightly longer to process.

Unable to Track Your Order?

If a tracked method isn't selected, your order will not be trackable.

For international orders, if you purchased tracked shipping and cannot access your tracking, please enter your tracking number at either https://parcelsapp.com or search your local country carrier and enter your tracking.

 Shipping Rates and Delivery Estimates

NOTE: Shipping times may vary. 

Please allow a minimum of 7 days after the due delivery date before contacting us about your order.

International Shipping Policy

Additional charges for international shipping may apply. We are not responsible for additional charges and taxes. Shipping charges for your order will be displayed at checkout. Please fill out our contact form for further enquiries.

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