Medication vials come in a lot of sizes. None of them come with a decent place to live. Loose vials rattling around a fridge door or stacked in the cardboard tray they shipped in is not a system. It's a scavenger hunt. The MC Vault fixes that. One case, three vial sizes, two capacities. Pick the vial size you use (3mL, 5mL, or 10mL), pick how many you want to store (5 or 12), and pick your color. Every slot holds one vial snugly with no rattling, no tipping, and no contact between vials. The threaded lid locks down tight enough for the fridge and durable enough to toss in a bag or carry-on. A rubber grip base keeps it exactly where you put it on the shelf. No labels on the outside. No indication of what's in there. Just a clean, solid case in your color of choice. Made from rigid plant-based bioplastic. Designed, printed, and shipped from Michigan. Available in 18 colors plus a Random option, and custom colors are available on request. Which size do I need? 3mL: Fits Zepbound® 3mL LillyDirect single-dose vials and standard 3mL medication vials, approximately 17mm diameter x 38mm tall. Compounded GLP-1, tirzepatide, semaglutide, peptides, hormones, and insulin vials of compatible dimensions. 5mL: Fits standard 5mL medication vials, approximately 22.5mm diameter x 35.5mm tall. Compounded GLP-1, peptides, testosterone, hormones, and insulin vials of compatible dimensions. 10mL: Fits standard 10mL medication vials such as insulin, peptide, and testosterone vials. Also accepts the MC Vault 10 Adapter (sold separately), which sizes 3mL vials up to the 10mL footprint so you can store a mix of both in one case. Features: Holds 5 or 12 vials Available for 3mL, 5mL, and 10mL vials Threaded lid, fridge and travel capable Rubber grip base for stability in the fridge Durable rigid plant-based bioplastic construction 18 colors plus Random, custom colors available Designed, printed, and shipped from Michigan Important: Case only. Vials, syringes, needles, and medication are not included. Not insulated and not an active cooling device. Verify your vial dimensions before ordering. Rainbow cases vary in color transition order and thickness, so no two are identical. Random color is our pick from available stock. Hand wash with cool water only. Aftermarket storage accessory. Not affiliated with, endorsed by, or sponsored by Eli Lilly or any pharmaceutical brand. Always follow your healthcare provider's instructions and the manufacturer's storage guidelines for your medication.