By DC Additive Pros, a US-based 3D-printing shop that builds lab organization gear. Last updated: July 2026.
The fastest way to store peptide vials without mix-ups is a fixed-slot peptide vial rack that keeps every vial upright, labeled, and in one mappable position, and the version that actually scales is a stackable one. The DC Additive Pros 84-slot peptide vial rack ships as a 2-pack of 42-slot honeycomb trays that interlock with corner alignment pegs, so you start with 84 vials and add more 2-packs as your library grows. It is fridge and freezer safe down to -20 °C, open-top for full label visibility, and Made in the USA for $24.99. Below is how to set up peptide vial storage that stays organized from 84 vials to 840.
Why do peptide vials get mixed up in the first place?
Peptide vials get mixed up because they all look identical and roll around loose storage. A pile of 3 mL lyophilized vials in a drawer or bin has no fixed positions, so the only thing telling BPC-157 from tirzepatide is a small printed label you have to pick up and read one vial at a time. Caps touch, vials tip, and residue migrates. A rack fixes this by giving each vial one permanent, numbered slot you can map to your inventory log, so a vial is only "wrong" if both the slot and the log are wrong, which almost never happens.
What makes a vial rack "stackable," and why does it matter?
A stackable vial rack has built-in alignment pegs that let trays lock together and expand instead of spreading across your whole bench or fridge shelf. The DC Additive Pros rack comes as two 42-slot trays, 84 slots total, with corner alignment pegs so the trays interlock cleanly. When your peptide library outgrows 84 vials, you don't rebuy a bigger rack. You add another 2-pack and keep the exact same numbering scheme, so 168 or 252 vials stay just as findable as 84. That modularity is the difference between storage that scales with your work and storage you replace every few months.
Can you keep the rack in the fridge or freezer with your vials?
Yes. The rack is engineered from lab-grade polymer built for repeated cold-storage cycling, so it holds up at room temperature, in the refrigerator (2 to 8 °C), and in a standard freezer down to -20 °C. That covers where reconstituted and lyophilized research peptides actually live. The open-top design means you read every label without pulling a lid off in the cold, and the wipe-clean surface stays odor-free. It is not rated for autoclave or high-heat sterilization, so keep it out of the oven and off the hot plate.
What size vials fit an 84-slot peptide rack?
It fits the universal 3 mL lyophilized vial standard, up to 18 mm in diameter and 39 mm tall, which covers standard crimp-top and screw-top research vials. That includes the vials most labs and researchers handle every day: BPC-157, semaglutide, tirzepatide, GLP-1, CJC-1295, ipamorelin, TB-500, and similar. Each hexagonal honeycomb cell cradles a vial at six contact points, so vials sit upright and don't roll, even when the tray is only half full. Vials are not included.
How do you label and log an 84-slot rack so audits are fast?
Use a simple grid coordinate system and record it once. Number the rows and columns, for example rows A to G by columns 1 to 6 on each 42-slot tray, and write each vial's slot into your inventory sheet or LIMS. Because the honeycomb positions never move, your map stays accurate between sessions, so an audit or a hand-off between techs becomes "go to tray 1, slot C4" instead of reading labels one by one. When you add a second 2-pack, continue the same scheme (Tray 3, Tray 4) and your logging habit scales without any relearning.
84-slot stackable rack vs. 100-slot sealed case: which should you buy?
Choose the open-top stackable rack for daily bench and fridge use, and the sealed case for transport or long-term closed storage. If you're organizing an active peptide library you reach into often, the open-top rack wins on speed and expandability. If you need a gasketed, closed container to move vials or lock them away, the 100-slot hard-shell case is the better fit. Here's the quick comparison:
| 84-Slot Stackable Rack (2-Pack) | 100-Slot Sealed Case | |
|---|---|---|
| Best for | Daily bench and fridge access | Transport and closed storage |
| Capacity | 84 (two 42-slot trays) | 100 in one case |
| Design | Open-top, honeycomb, stackable | Gasket-sealed hard shell |
| Expandable | Yes, add more 2-packs | Add more cases |
| Vial size | 3 mL (up to 18 mm by 39 mm) | 3 mL research vials |
| Price | $24.99 | $49.99 |
Specifications at a glance
| Total capacity | 84 vials (2 trays of 42 slots) |
| Slot fit | Vials up to 18 mm diameter and 39 mm tall |
| Compatible vials | Standard 3 mL crimp-top and screw-top lyophilized research vials |
| Cell design | Hexagonal honeycomb, 6 contact points per vial |
| Stackable | Yes, built-in corner alignment pegs |
| Temperature range | Room temp to -20 °C (fridge and standard freezer safe) |
| Material | High-strength engineered polymer, wipe-clean |
| Origin | Made in the USA by DC Additive Pros |
| Price | $24.99 (2-pack) |
Frequently asked questions
How many vials does the 2-pack hold, and can I expand it?
The 2-pack holds 84 vials, two trays of 42, and it's expandable. Corner alignment pegs let the trays interlock and stack, so you add more 2-packs to grow capacity while keeping the same numbering scheme. There's no need to buy a larger rack later; the system scales with your library.
What size vials fit this peptide rack?
It's sized to the universal 3 mL lyophilized vial standard, up to 18 mm diameter and 39 mm tall. It accepts standard crimp-top and screw-top research vials, including common peptide vials such as BPC-157, semaglutide, tirzepatide, and GLP-1. Vials are not included.
Can I keep it in the fridge or freezer?
Yes. The engineered polymer is built for repeated cold-storage cycling: room temperature, refrigerator (2 to 8 °C), and standard freezer down to -20 °C. It is not rated for autoclave or high-heat sterilization.
Will the vials tip or roll around?
No. Each hexagonal honeycomb cell cradles a vial at six contact points, which stops lateral rolling and tipping, while the open top keeps every label visible at a glance.
Is it really made in the USA?
Yes. DC Additive Pros manufactures the rack in-house in the United States from high-strength engineered polymer. Domestic production also means faster restocks and the option of custom slot sizing for larger vials on bulk reorders. Email info@dcadditivepros.com.
Can I order a custom slot size for larger vials?
Yes. Because production is in-house in the USA, custom slot sizing is available, typically in 3 to 7 days depending on volume and size. Contact info@dcadditivepros.com with your vial dimensions.
Get organized peptide storage that scales
If you're tired of hunting through look-alike vials, start with one stackable 2-pack and add more as your library grows. The 84-slot stackable peptide vial rack is $24.99, fridge and freezer safe, and Made in the USA. Grab yours here. Need a sealed option for transport? See the 100-slot hard-shell case.