Keeper Ten
A stainless steel lunchbox that's safe in the microwave. Hygienic, airtight, and free of any abrasive coating.
- Korean SUS304J1 stainless steel, microwave-safe (patented technology)
- 4-point airtight lid with double silicone seal — it doesn't leak
- No abrasive coating, thanks to an electrolytic finishing process
- Every part comes apart for easy washing
- Available in 4 sizes and 19 colors
Yes — it goes in the microwave
Keeper Ten is made of hygienic Korean stainless steel and, thanks to a patented technology, can be used in the microwave — something ordinary stainless steel can't do.
- Don't put the lid in the microwave (it can warp)
- Keep heating to under 10 minutes; beyond that, the PP part may deform
- If you need longer, remove the PP part and use only the stainless container
- Avoid the microwave's oven/grill function: the PP could melt
Note: PP (polypropylene) is heat-resistant to roughly 120–140 °C.
No abrasive coating
Most stainless containers need their abrasive coating scrubbed off before first use. Keeper Ten is made with an electrolytic process: no abrasive coating, no pre-cleaning needed.
Ordinary steel
Leaves abrasive residue even after many washes.
Keeper Ten
No residue: ready to use, hygienic from day one.
Turn it upside down — it still won't leak
A 4-point locking lid with a double food-grade silicone seal keeps everything inside. No more worrying about stains in your bag.
4-point lid
Locks on every side for an airtight seal.
Double seal
Two layers of food-grade silicone against leaks.
SUS304J1 body
Hygienic steel that helps hold temperature.
Comes apart, washes clean, stays hygienic
Every part separates. The lid has a groove that makes the silicone seal easy to remove — no limescale, no mold.
Why choose Keeper Ten
Looking for the perfect container? Here it is.
Plastic
Light, but with the worry of endocrine disruptors.
Glass
Hygienic, but heavy and not freezer-friendly.
Ordinary steel
Has an abrasive coating and isn't microwave-safe.
Keeper Ten
Hygiene, convenience and design — all in one.
An award-winning choice
Over 100,000 units sold and thousands of real reviews — a result built on customer trust.
SUS304J1 steel, 100% made in Korea
Did you know steel has grades too? Keeper Ten uses premium SUS304J1: a high-grade, copper-bearing steel with excellent antibacterial and anti-corrosion properties.
Hygiene, zero worry
Copper inhibits bacteria: an antibacterial, anti-corrosion surface.
Zero color transfer
A dense, smooth surface: kimchi and curry leave no stains.
Zero odors
A pore-free structure: food smells don't cling.
4 sizes, 19 colors
Choose by your taste and your recipes. (Sizes may vary slightly; real colors may differ from your screen.)
Sides, fruit
The smallest size — ideal for side dishes and snacks.
Fruit, soups
Great for kids' lunches and lighter meals; also single-serve soups.
Rice bowl
The most-loved lunch size: rice and one-bowl meals.
Salad, pasta
Salads, pasta and main dishes (even braises).
Key features
Usage compatibility
| Microwave | ✅ Yes — without the lid, under 10 min. For longer, remove the PP part and use only the steel. |
|---|---|
| Microwave oven/grill | ❌ Don't use: the PP can melt. |
| Oven | ⚠️ Inner steel container only (without the PP part). |
| Air fryer | ✅ Under 5 minutes, inner steel only. |
| Induction | ⚠️ Inner steel only, up to about 180 °C. |
| Dishwasher | ✅ Inner steel only; avoid high-temperature cycles for the PP part. |
| Freezer | ✅ Yes. After freezing, let it sit at room temperature 1–2 min before opening. |
Before you use it
- Always wash the product before first use.
- After washing, dry it completely before storing.
- Keep away from open flames or direct heat sources.
- Hard impacts can damage the product.
- After the freezer, let it sit at room temperature 1–2 min before opening the lid.
- In the microwave, avoid prolonged use and never heat the container empty.
- In the microwave, use without the lid and don't heat two containers together.
- In the microwave, keep the container from touching the walls.
Information
| Name | Keeper Ten |
|---|---|
| Material | SUS304J1 stainless steel (inner) + PP (outer) |
| Sizes / colors | 4 sizes · 19 colors |
| Origin | South Korea |
| Warranty | Within 14 days of receipt (product defects) |
| Shipping | Tracked international EMS from Korea |