Yuki
A full-size ice-pack air cooler built from printed parts, a quiet USB fan and a frozen water pack. Freeze the pack overnight, place it inside, and Yuki sends a steady cooler stream across the desk with very low power use.
River collection
Ice air coolers
Freeze the water-filled pack overnight, then use the fan to move a colder breeze across the desk.
Yuki Snowflake
The snowflake full-size Yuki: the same low-energy frozen-pack airflow in a more decorative shell, shared as refined G-code for cleaner internal overhangs.
Yuki Mini
A compact personal cooler for desks and small rooms: printed PLA parts, a quiet USB fan and a frozen water pack or bottle. It gives a close, steady stream of cooler, drier air without a compressor or refrigerant loop.
Yuki Snowflake Mini
A smaller decorative air-cooler shell built around the frozen ice-pack or bottle airflow idea: simple printed parts, low power and a softer winter shape for personal desk cooling.
Bulbasaur Air Cooler
A playful Bulbasaur-style ice air cooler shell: the Yuki frozen ice-pack airflow idea turned into a characterful low-energy desk object.
Gengar Air Cooler
A Gengar-style ice air cooler shell with the Yuki formula inside: printed parts, a USB fan and frozen ice-pack airflow in a darker, mischievous desk object.
Related guides
AIR COOLERS
How Yuki ice-pack air coolers work
Fill the ice pack with water, freeze it overnight, then let Yuki move air around the cold pack for a cooler desk breeze.
AIR COOLERS
Do ice pack air coolers actually work?
Ice can cool the air near a desk, but it is not an air conditioner. Distance, airflow, ice mass and room expectations matter.
DESK COOLING
DIY desk air cooler with a USB fan and frozen water
A small fan, a frozen pack and a printed body can make a close personal breeze colder without pretending to cool the whole room.
AIR COOLERS
Why full-size Yuki uses post-processed G-code
The larger Yuki air coolers use direct Cura-generated and Python-refined G-code so the internal overhang prints cleaner than a normal model workflow.
SLICING GUIDE
How to slice Yuki Mini
Yuki Mini uses printed parts, a fan and a frozen water pack. The slicing work matters because airflow, overhangs and the ice-pack geometry need different priorities.
POLYPROPYLENE
Why River uses polypropylene for bottles, Jem and Yuki ice packs
Polypropylene is slow and demanding to print, but it can make watertight one-wall parts, living hinges and food-contact objects when the workflow is controlled.
Also from River Family
Air purifiers
Roy
A quiet, USB-powered air purifier that just does its job. Cleaner room air from a printed object that actually looks like it belongs on the shelf — no humming appliance, no exposed electronics.
Water filters
Jem
A polypropylene tap water filter for activated carbon. The flower-like top opens for filling, the body attaches to standard taps, and the bottom grid holds carbon while water passes through. Joined G-code keeps the water path cleaner by reducing micro-stringing.