3-Mode Pen Cooler · USB Cooling, 18-Hour Ice Ring & Ice Cube

TL;DR

3-Mode Pen Cooler · USB Cooling, 18-Hour Ice Ring & Ice Cube from PreppinPeppers. 2 options at 154.99 USD, 2 available to order. Includes: USB / power-bank powered cooler with freezable ice ring and digital temperature display; holds one pen upright. Sold for research and educational use only.

Facts Index

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FAQ

id="how-does-the-3-mode-pen-cooler-stay-cold-without-a-battery"How does the 3-Mode Pen Cooler stay cold without a battery?

It is a passive-active hybrid: there is no internal battery, so there is nothing to wear out or fail, and it draws power from any DC 5V USB source (a power bank, wall adapter or car charger) for as long as it is plugged in. Unplugged, you freeze the 304 stainless ice ring for 6–8 hours, drop it in, and the double-wall vacuum cabin holds cold for up to about 18 hours. Ice cubes work as a third emergency backup in the food-grade PP bucket. Run only one cold source at a time — never combine the ice ring with the electric cooling lid.

id="how-long-does-the-3-mode-pen-cooler-actually-run"How long does the 3-Mode Pen Cooler actually run?

Three runtimes, depending on which cold source you use. USB power: unlimited, for as long as it is plugged in. Freezable ice ring: up to about 18 hours with no power at all (freeze the ring 6–8 hours first). Ice cubes: an emergency backup that bridges you to the next charge or the next frozen ring. There is no sealed battery in the spec, so there is no "battery runtime" number to degrade over the life of the unit.

id="does-the-3-mode-pen-cooler-fit-all-preppinpeppers-pens-or-only-certain-models"Does the 3-Mode Pen Cooler fit all PreppinPeppers pens, or only certain models?

It fits any standard 3 ml cartridge pen in the PreppinPeppers lineup: the Gansulin metal pen, the V1 (80-unit), the V2 (60-unit), and the V3 (60-unit). The 54 mm cooling chamber is dimensioned for the standard 3 ml glass cartridge body, which is the same outer diameter across all of our pen models because they all take the same standard 3 ml glass cartridge. If you have a V1, V2, or V3 pen, it fits this cooler the same way the Gansulin does.

id="what-is-the-difference-between-the-3-mode-pen-cooler-and-the-travel-cooler-box-which-one-do-i-need"What is the difference between the 3-Mode Pen Cooler and the Travel Cooler Box — which one do I need?

The 3-Mode Pen Cooler is a single-pen cylindrical cabin (54 mm chamber, 800 ml capacity, 304 stainless-steel double-wall vacuum) that runs from USB or a freezable 18-hour ice ring and holds one pen upright — it doubles as a travel case. The Travel Cooler Box is a larger hard-shell cold box with a fitted tray that holds twelve 3 ml vials, runs about 12 hours on its internal battery or indefinitely on USB, and shows the internal temperature on a digital lid display. If you are moving one pen and want it to double as a case, pick the 3-Mode. If you are transporting a batch of vials and want to read the temperature without opening the lid, pick the Travel Cooler Box.

id="can-i-fly-with-the-3-mode-pen-cooler"Can I fly with the 3-Mode Pen Cooler?

The ice-ring mode is the flight mode: a frozen stainless ring inside a vacuum cabin, no lithium battery, no gel pack, nothing to plug in. There is no internal battery to trigger airline lithium-cell rules, and the ice ring is a solid metal object rather than a liquid subject to the 3-1-1 limit, so there is nothing to declare at security. The cooler is sold as laboratory and research transport equipment; we do not make any claim about what you store inside it, and your specific material's storage guidance is always the final word on how it should travel.

id="how-does-the-temperature-display-and-thermostat-work"How does the temperature display and thermostat work?

The digital display on the lid shows the actual internal cabin temperature and lets you set a target, with two cooling modes: energy-saving (节能) for a steady hold and quick-cool (速冷) for a faster pull-down. The display and mode buttons are not labelled in English on the device; the included illustrated English user manual translates every button and spec, so nothing gets lost in translation.

id="which-carry-case-or-cooler-fits-my-pen-what-is-the-difference-between-the-options"Which carry case or cooler fits my pen — what is the difference between the options?

Three options, all sized around a standard 3 ml cartridge pen. The Portable Pen Carry Case is a PU hard-shell zip case that holds one pen plus spare cartridges — no active cooling. The EVA Travel Case is a moulded shell with a reusable gel ice pack that holds one pen for short trips. The 3-Mode Pen Cooler is the only one of the three that actively cools, holds the pen upright, and gives you three power strategies. For research and educational reference only.

id="if-i-have-no-usb-power-how-does-the-3-mode-pen-cooler-keep-working"If I have no USB power, how does the 3-mode pen cooler keep working?

The cooler is designed so you are never dependent on a single power source. It runs from USB power off any power bank, wall socket or car when you have it; without power it falls back to a freezable 18-hour ice ring, and food-grade ice cubes serve as an emergency backup. All three modes sit inside a double-wall vacuum cabin that stretches each one, and the cooler holds the pen upright.