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. Too many for the compact cases, not quite enough to justify the big ones - and the original prescription boxes were never designed to live in your fridge long-term. They flop open, they take up twice the space they need to, and they broadcast your medication to anyone who opens the door.
The MC Slim 8 was built for this exact situation.
This is a slim, vertical fridge storage case designed to hold exactly 8 Zepbound, Mounjaro, or Trulicity auto-injector pens in two clean rows of four. The footprint is narrow enough to tuck into a fridge door shelf or slide alongside other items without claiming half the shelf. The case stands upright, keeps your pens organized and out of sight, and opens with a secure latching lid that closes with a satisfying, deliberate click every single time.
Inside, the same exclusive 3D-scanned saddle system found across the entire Massive Customs lineup cradles each pen precisely - built from an actual scan of the real injector geometry. Paired with an internal funnel guide that helps each pen seat smoothly without contacting its neighbors, it is the kind of fit that makes generic boxes with holes feel like an embarrassing first draft by comparison.
One important note: Zepbound and Mounjaro single-dose pens must stay refrigerated. Per Eli Lilly's official prescribing information, once a pen leaves the fridge it can only be kept at room temperature for up to 21 days - and cannot be returned to the fridge afterward. The MC Stack is a fridge storage case. It is not insulated and is not designed for travel or extended room-temperature use. If you need a travel-capable option, check out the MC Cannon or the MC Solo.
Made from rigid plant-based bioplastic. Designed, printed, and shipped from Michigan. Available in multiple color options - custom colors available on request.
Compatible with: Zepbound, Mounjaro, and Trulicity auto-injector pens
Features:
- Holds 8 injection pens in 2 rows of 4
- Slim vertical design - fridge-friendly footprint
- Secure latching lid for confident, polished closure
- Exclusive 3D-scanned internal saddle system for precision fit
- Exclusive internal funnel geometry guides each pen smoothly into place
- No external branding - completely discreet
- Made from rigid plant-based bioplastic
- Multiple color options, custom colors available
- Designed, printed, and shipped from Michigan
Dimensions:
- Width: 182 mm
- Height: 158 mm
- Depth: 77 mm
Important:
- Case only - pens not included
- Not insulated, not a cooler - fridge storage only
- Hand wash with cool water only
- Per Eli Lilly's prescribing information, Zepbound single-dose pens can only be stored at room temperature for up to 21 days and cannot be returned to the fridge once removed
- Aftermarket storage accessory - not affiliated with, endorsed by, or sponsored by Eli Lilly, Boehringer Ingelheim, or any pharmaceutical brand. Always follow your healthcare provider's instructions and the manufacturer's storage guidelines for your medication.
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- 5 stars: 106 (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.
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.
Excellent communication. Exactly what I wanted. Wonderful detail and fits my injection pens perfectly. Exceeded my expectations!
Very nice seller. Great communication.
Exactly as described everything fit perfect I had ordered a different set from Amazon and they didn’t fit so these fit perfectly!