Massive Customs
MC Slim 8 - The Original Massive Customs 8-Pen Slim Fridge Case for Zepbound® & Mounjaro® Injection Pens
MC Slim 8 - The Original Massive Customs 8-Pen Slim Fridge Case for Zepbound® & Mounjaro® Injection Pens
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Eight pens is an awkward number to store. It's too many for the compact cases and not quite enough to justify the big ones, and the original boxes were never meant to live in your fridge long-term. They flop open, take up twice the space they need, and broadcast your prescription to anyone who opens the door. The MC Slim 8 fridge case holds exactly eight Zepbound, Mounjaro, or Trulicity single-dose auto-injector pens in two clean rows of four, in a slim, upright case with a real fit, as opposed to flimsy cardboard.
"I LOVE my Mounjaro pen holder - it takes up less room than the boxes they’re shipped, and it’s much easier to see how many I have left. I highly recommend!"
Stacy, verified buyer ★★★★★
The short version
8 pens
Two rows of four
77mm
Front to back. 182mm wide x 158mm tall
14 colors
In Stripes, Hearts, or Dots
Fits: Zepbound, Mounjaro, and Trulicity single-dose auto-injector pens. Does not fit: KwikPens or Wegovy pens. For those, see the MC Kwik for Zepbound KwikPen, the MC Kwik for Ozempic, or the MC Slim for Wegovy.
Why this beats the original boxes
- Slim footprint. Narrow enough to tuck into a fridge door shelf or slide alongside other items without claiming half the shelf.
- A real fit. Our exclusive 3D-scanned saddle system was built from an actual scan of the pen, so each one sits precisely.
- Self-guiding. Internal funnel geometry helps each pen seat smoothly without bumping its neighbors. It makes generic boxes with holes look like an embarrassing first draft.
- Latching lid. Closes with a satisfying, deliberate click every single time.
- Discreet. No external branding. It stands upright and keeps your pens organized and out of sight.
- Built to last. Rigid plant-based bioplastic. Custom colors available on request.
- Made here. Designed, printed, and shipped from Michigan.
Who it's for
Anyone holding two months of pens, or anyone who wants a little breathing room past a single month. This is a fridge storage case. It is not insulated and is not designed for travel or extended room-temperature use. If you need something travel-friendly, check out the MC Cannon or the MC Solo.
Quick answers
Will it fit my pen?
If you use Zepbound, Mounjaro, or Trulicity single-dose auto-injector pens, yes. KwikPens and Wegovy pens need their own cases (linked above). Not sure which pen you have? Shop all cases here, or message us and we'll sort it out before you order.
The lid feels tight. Is that normal?
The lid is designed to snap firmly into place once all the pens are seated. Pens should slide down and settle into the saddles on their own. If the lid won't close, check the seating first. Don't force it.
Will it fit my fridge door?
It's built to fit most fridge door shelves, but they vary. It measures 182mm wide, 158mm tall, and 77mm front to back, so measure your shelf before ordering.
How do I clean it?
Hand wash with cool water and mild dish soap. It's not dishwasher safe, and it shouldn't be left in a hot car or direct sunlight.
Storage case only. Medication not included. Always follow your healthcare provider's instructions and the manufacturer's storage guidelines for your medication. Zepbound, Mounjaro, and Trulicity are trademarks of Eli Lilly and Company; Ozempic and Wegovy are trademarks of Novo Nordisk. Massive Customs is not affiliated with or endorsed by these companies.
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- 5 stars: 109 (99%)
- 4 stars: 0 (0%)
- 3 stars: 1 (1%)
- 2 stars: 0 (0%)
- 1 star: 0 (0%)
This is the second holder I have purchase from MassiveDerekDesign. The quality of these is exemplary. The shipping was lightning fast. I highly recommend this seller.
Looks so much better in the fridge and loved the personalized note from Derek! Great give for friends that are on glp!
I purchased this as a gift. I haven't heard anything but good back. My cousin is so happy this is keeping her husbands meds safe and her fridge clean and organized.
I read about this container on the Zepbound sub-reddit and Derek's design does not disappoint. I can't wait to share it with others!
I'm so happy with this! It's incredibly well-made/well-designed. The print-out instructions that came with it were clear and also encouraging. The presentation on opening the box was top-notch - you can tell this seller cares about quality and making sure you get a nice experience.
This super convenient and makes storage easy. I also had an issue wit a previous order (my error) and Derek was aces. Will recommend to anyone I know
Beats the boxes!!
Works as expected, delivered quickly.
Another great product by Derek. keep up the great work.
I LOVE my Mounjaro pen holder - it takes up less room than the boxes they’re shipped, and it’s much easier to see how many I have left. I highly recommend!
Fast shipping! Quality is great! I would buy again!
I took a risk and ordered two of the cases. I received them today and without hesitation, I am submitting a review. Worth every dollar! These cases are beautifully made! Very sturdy, rich colors, and detailed designs. NOT cheap and flimsy. The tops fit snugly. There are holes inside for ease of insertion and to keep the pens upright. The narrow design is so much better than the box the pens come in and the dense sturdy materials used to make the case will certainly protect the medication from exposure to light and protect your privacy. You cannot see through them. I am delighted with my purchase. Go ahead and purchase yours today!
Very high quality and shipped quickly!
Always wonderful working with this seller who makes great quality holders.
Loved the item. Would purchase again.
This is a great product and the handwritten note was a lovely touch =)
What a fantastic case! Thank you!!
This is my second Massive purchase. After letting my mom borrow my 4-pen holder, I discovered this 8-pen holder. Now I have enough holders to store all 12 pens I get at a time. The lid is VERY snug on this one and I do struggle a little to get it open but, otherwise, I love it.
Great customer service- Derek was very responsive, and the order even came with a thoughtful, personable note. The product is practical and exactly what I needed! Thanks!
I've only had this for a day but it looks like it will suit its purpose. Sizing is great. Shipping was quick and items were packed well.
Came quick, as expected, nice note from seller. Fits my Zepbound pens perfectly. Makes me feel better about having it in the fridge/more discreet. Highly recommend!!
Wonderful product. Useful for the purpose
This is a well designed, practical product. I wanted a way to protect my Zepbound pens and keep them discreet in the fridge, and this does exactly that. The pens fit securely, the lid closes well and stays in place without being hard to open, and the container fits neatly in my fridge door without taking up much space. I plan to buy the single version for travel and another set as a gift. It would make a great gift for someone starting their health journey.
Item was as described and of quality material. Appreciate the personalized note that was in the packaging.
Shipping was faster than I had thought. Color is as pictured. Thick and feels durable great for traveling.