7 USB #Insulin Coolers: Size, Volume & Vial Capacity Compared + How Many Insulin Vials Fit?

How many insulin vials actually fit in a USB medicine cooler? I tested 7 popular models — and the results are surprising. In this video I compare the RxCoolers Mini, X8 Insulin Cooler, 4AF Voyager, 4AF Voyager XL, RxCoolers Max (Pioneer), SC019-1 CHETAITAI & X6 Pioneer Pro using real measurements, volume calculations and live insulin vial fit tests. I also show a simple DIY paper method anyone can use at home to predict cooler capacity before buying. This video is a comprehensive, independent evaluation of 7 popular USB medicine coolers. The host, Sir Koolzalot, compares these devices based on their physical dimensions, volume, and actual insulin vial storage capacity. The Contenders (2:06). The tested models include: RX Coolers Mini (X4 Mini Pro) X8 Insulin Cooler 4AllFamily Voyager (X1) 4AllFamily Voyager XL RX Coolers Max (Pioneer) SC019-1 CHETAITAI Pioneer Pro (X6) Methodology (4:37 - 16:53) To ensure consistency, the host shows a simple DIY paper method to accurately measure the inner circumference and diameter of the aluminum heat-sink tubes. He also performed live packing tests using Practi-Insulin training vials to determine real-world capacity, warning viewers that these glass vials can rattle or break if not packed securely (19:14). Key Findings & Capacity Results (42:17) After conducting measurements and packing trials, the host summarized the vial capacity for each model: RX Coolers Max & Voyager XL: 15 vials (the highest capacity tested) CHETAITAI & Pioneer Pro (X6): 12 vials Voyager (X1): 9 vials RX Coolers Mini (X4): 6 vials X8 Insulin Cooler: 3 vials Key Takeaways Diameter is Key (37:38): The internal diameter/circumference is the most critical factor for storage capacity. Because of the limited space, most devices cannot accommodate more than three rows of vials, making width more important than the vertical height of the tube. Fiddliness: Packing these coolers can be a delicate process, especially with models like the Voyager XL and RX Coolers Max that feature plastic rims at the base (28:40, 31:27). Data Precision: The host notes that while retailer-published specifications are generally close, they often contain rounding errors or inconsistencies; his measurements were specifically calculated for accuracy (12:22, 41:13). 🔬 Tested independently — no sponsorships, no manufacturer affiliations. 📊 Full data: sirkoolzalot.com 📧 Import pricing for subscribers: [email protected] ❄ Stay Kool — Your ♞ Bespoke Knight