Introduction
The Subminimal NanoFoamer Lithium is a high-performance, handheld milk frother designed to create cafe-quality microfoamed milk for various coffee beverages. This device features a USB-C rechargeable lithium-ion battery, dual-speed operation, and IP4 waterproofing for convenience and durability. Its patented NanoScreen technology ensures a smooth, creamy texture suitable for latte art.
What's in the Box
Upon unboxing your NanoFoamer Lithium, ensure all components are present:
- One NanoFoamer Lithium unit
- One Protective Hood
- One USB-C charging cable
- Two NanoScreens (Fine and Superfine)

Image: The NanoFoamer Lithium with its complete set of accessories, including the main unit, protective cover, charging cable, and two distinct NanoScreens.
Charging
The NanoFoamer Lithium is equipped with a USB-C rechargeable lithium-ion battery. Before first use, fully charge the device. The battery level indicator lights on the unit will show the charging status and remaining power. Use the provided USB-C cable for charging.

Image: The NanoFoamer Lithium highlighting its battery indicator, dual-speed control, and waterproof feature.
NanoScreens
Your NanoFoamer Lithium comes with two interchangeable NanoScreens: a Fine NanoScreen and a Superfine NanoScreen. These screens are crucial for achieving different microfoam textures.
- Fine NanoScreen: Recommended for beginners, it produces a thicker microfoam.
- Superfine NanoScreen: Creates a thinner, more delicate microfoam, ideal for advanced latte art.
To change a NanoScreen, gently pull the current screen off the impeller and snap the desired screen into place.

Image: Detailed view of the NanoFoamer's internal components, including the Superfine and Fine NanoScreens, replaceable impeller, and robust shaft.
Operation
Follow these steps to create microfoamed milk:
- Choose NanoScreen: Select either the Fine or Superfine NanoScreen based on your desired foam texture. The Fine NanoScreen is generally easier for initial results.
- Prepare Milk: Pour warm milk into a suitable pitcher or cup. Ensure there is at least 3.8 cm (1.5 inches) of milk depth for optimal frothing.
- Churn: Submerge the NanoFoamer's impeller into the milk. Press the digital on/off switch to activate. Start by adding a small amount of air to the foam by keeping the impeller near the surface for a few seconds, then move it deeper into the milk to create a consistent blend. Continue for approximately 20-30 seconds. The dual-speed digital switch allows you to control the frothing speed.
- Pour: Once the milk is perfectly microfoamed, pour it over your espresso or coffee drink.

Image: A visual guide demonstrating the three key steps for using the NanoFoamer to create microfoam.
Cleaning & Maintenance
The NanoFoamer Lithium is IP4 waterproof, making cleaning simple and efficient.
- After each use, rinse the frothing wand and NanoScreen under running water.
- For thorough cleaning, the NanoScreen and impeller can be removed.
- The main unit should not be submerged. Hand wash only.
- Store your NanoFoamer on the adhesive wall-mount (if included) or place the protective hood over the frothing wand before storing it in a drawer.

Image: The NanoFoamer Lithium being rinsed under running water, demonstrating its waterproof design for easy cleaning.
Specifications
| Brand | Subminimal |
| Model Name | Lithium |
| Item Model Number | NF-03-LI |
| Color | Black |
| Material | Plastic, Stainless Steel |
| Product Dimensions | 1.4"W x 9.4"H |
| Item Weight | 5.3 ounces (150 Grams) |
| Power Source | Battery Powered (USB-C rechargeable lithium-ion battery) |
| Special Features | IP4 Waterproof, High-Speed Motor, Dual-Speed, Two Sieve Attachments |
| Included Components | One NanoFoamer Lithium, One Protective Hood, One USB-C cable, Two NanoScreens |
| Product Care Instructions | Hand Wash Only |
