Peptide Boxes with Blister or Molded Tray

Formed tray or sealed blister?

These two terms get used interchangeably, but they are different products with different costs.

• Formed tray — An open tray with pockets. The vial drops in and is held by the pocket walls. No sealing, no lidding film, lower cost.
• Sealed blister — The same formed pockets, with a lidding film or board sealed across the top so each vial is enclosed. Requires sealing equipment at your end.
• Push-through blister — A sealed blister with a foil lid the user pushes the vial through. Rare for glass vials; more common for smaller items.
• Peel-open blister — A sealed blister with a lidding film that peels away. Used where the pocket must stay intact after opening.

Most vial projects want a formed tray. Sealed blisters add a sealing operation, a lidding material and a validation burden, and are only worth it when the enclosure genuinely serves a purpose.

What a tray does that other inserts cannot

• Identical presentation — Every vial at the same height and angle — the requirement for a window box.
• Machine loading — A rigid, dimensionally repeatable tray can be indexed by automated equipment.
• Individual enclosure — When sealed, each vial sits in its own closed pocket.
• Wipe-clean surface — A plastic tray can be surface-cleaned in a way board and foam cannot.
• Visible contents — A clear tray lets the vial be inspected from more than one angle.

Tooling and what it means for cost

A formed tray needs a tool, and the tool is a one-off cost that is independent of the run size. That changes the economics considerably.

• Tooling is a fixed cost — Paid once, then amortised across every tray made from it.
• Low volumes suffer — On a short first run, tooling can dominate the unit price.
• High volumes benefit — Per-tray cost falls quickly, and can undercut foam at scale.
• Changes need new tooling — A different vial diameter means a new tool, so confirm the vial before committing.

Materials

• PET — Clear, rigid, widely recycled. The most common tray material.
• RPET — Recycled PET, slightly less optically clear, with lower embodied impact.
• PVC — Very formable and inexpensive, though increasingly avoided on recyclability grounds.
• PP — More flexible and heat-tolerant; less clear than PET.
• Moulded pulp — A paper-based formed tray. Opaque, matte, and recyclable with paper — a genuine alternative when clarity is not needed.
• Choosing between them — Clarity, recyclability and cost pull in different directions; the substrate reference sets out what each family gives up.

If clarity is not essential, moulded pulp is worth considering: it forms like plastic, recycles like paper, and gives a distinctly different look. We will send samples of both so the difference is tangible.

Pocket design

• Draft angle — Pocket walls taper slightly so the tray releases from the tool and the vial seats consistently.
• Pocket depth — Set so the vial is supported over enough of its height to stay upright under vibration.
• Finger relief — A scallop at the pocket edge so vials can be lifted out without tools.
• Web thickness — The flat material between pockets; too thin and the tray flexes, too thick and it wastes material.
• Tray flange — A rim that rests on the box walls, transferring load away from the base.

Flange design is what lets a loaded tray transfer weight into the box walls rather than the base panel — the load path that matters most on higher-count packs.

Which boxes take a tray

• Window cartons — The natural pairing; the tray guarantees a consistent view. See window peptide boxes.
• Two-piece boxes — The tray flange rests on the base walls.
• Sleeve and tray boxes — The formed tray can be the drawer itself, inside a printed sleeve.
• Rigid magnetic boxes — A clear tray over a printed base gives depth to the interior.
• Folding cartons — Straightforward, though the tray removes the flat-shipping advantage.

Ordering a tray

• 1. Confirm the vial finally — Tooling is vial-specific and expensive to change. Do not tool until the vial is settled.
• 2. Tray or sealed blister — Sealing adds equipment and material at your end, so decide early.
• 3. Material selection — PET, RPET, PP or moulded pulp — we send samples.
• 4. Tooling and sample — A sample tray is produced and loaded with your actual vials.
• 5. Production — Trays formed, trimmed, nested and shipped with the cartons.

Specification guidance

• Trays are specified by drawing and physical sample, not by artwork file.
• Send several vials, not one — pocket fit needs to work across normal vial variation.
• Tell us whether loading is by hand or by machine; it changes the draft angle and finger relief.
• If the tray sits behind a window, confirm the window position so pockets align with it.
• For sealed blisters, confirm your sealing equipment and lidding material before tooling.

Quality control

• Pocket dimensions are measured against the approved sample across the tray, not at one position.
• Trays are loaded and inverted to confirm vials are retained.
• Flange flatness is checked so the tray sits level in the box.
• Clarity is inspected for haze, scuffing and forming marks.
• Nesting is checked so trays separate cleanly during packing.

Delivery

• Trays ship nested in counted stacks inside corrugated cases.
• Nested trays take significant volume — plan storage before ordering.
• Cartons and trays are shipped together so components arrive matched.
• Nationwide delivery across the United States.