Usage and Care

Quick Start Guide  

  1. Charge fully before use (approximately 2 hours for fully empty battery)
    1. Plug AC Adapter into wall. Green LED will illuminate
    2. Lift charger port cover on device and insert charger pin
    3. Wall adapter LED will be red while charging, green when charge is complete

IMPORTANT NOTE: Keep AC port covered at all times except when charging

2. Prepare your Meal

    1. Release 3 top latches and remove cover
    2. Layer food with dense items at bottom, light items at top.
    3. Replace cover and secure cover latches
    4. Store in refrigerator, cooler or insulated bag to keep your meal fresh until ready to eat
3. ENJOY your Meal
    1. Press button (Double Press) to Power on Device
    2. Release the 3 top latches and loosen the cover
    3. Meal will be ready in 10-15 minutes
    4. Check the food temperature to see if it is to your liking
    5. NOTE: For HB-2, open pressure release valve while heating


  1. Make sure AC Port cover is closed securely
  2. Use soap and running water to carefully wash cover and stainless steel food tray only
  3. Do not submerge, not dishwasher safe
  4. Improper washing is not covered under the warranty 


    • For safety purposes, Hot Bento's heating cycle can only be initiated with a Double Press of the start button. Pressing the button only once will not start the unit's heating cycle. 
    • As with any heating device, check food temperature while heating to see if it’s to your liking. Most foods reach sufficient temperature between 10 to 15 minutes.
    • For best results, stir or rearrange your food 5-10 minutes after starting Hot Bento.
    • Layer food with dense items at bottom, light items at top.
    • RELEASE LATCHES FOR HEATING: The latches are designed to prevent leakage when carrying, releasing them for heating improves conductive circulation and increases heating efficiency. With latches released, food will get hotter and in much shorter time.
    • STEAM WARNING: Hot Bento’s heat modulation system is designed to control liquid and solid food heating. Use caution when heating small amounts of sauce or liquid inside Hot Bento. Hot Bento gets very hot, very quickly. Droplets or small pools of liquid can vaporize and cause difficulty in removing the top lid due to pressure imbalance. To solve this issue, simply release the latches and loosen the cover when heating. The latches are designed to prevent leakage when carrying, releasing them will improve heating efficiency and performance. For HB-2-open pressure release valve while heating.
    • Turn off the unit when your meal temperature is satisfactory to conserve battery and use for a second heating. In most instances, Hot Bento will need to be recharged after heating your meal. Some lighter meals will allow for a second heating on a single charge. 


Hot Bento's heating time and temperature will vary with different types of meals,  depending on the density of their contents. We've heated a few recipes and recorded the results below. Please note that time and temperature values are approximate and may vary from use to use.



Temperature after 10 minutes


Temperature after 15 minutes

Chicken and Vegetable Pasta

Hot Bento heating lunch box with pasta

3 Cups of Steamed Vegetables

Hot Bento heating steamed vegetables

Sliced Fried Chicken with Mac & Cheese

Hot bento heating Mac and cheese

Carne Asada Burrito

Hot bento heating burrito



HB-2 note for flying: Altitude can cause vacuum conditions in sealed containers making the cover difficult to remove. Open the pressure relief valve to equalize and prevent vacuum.

  • Hot Bento's stainless-steel food tray in non-removable and features an FDA certified Food Safe non-stick coating for easy cleaning. 
  • Hot Bento will automatically shut off when the stainless-steel food tray temperature reaches 125C/257F. It will cool slightly then restart. This feature extends battery life as the device is not running entire time it is heating.
  • With liquid or thin soup, be aware that boiling point is 100C/212F. At that temperature, it boils off and Hot Bento does not reach automatic shut off. When heating liquid, power runs continuously and will turn off in 13-15 minutes.
  • Battery life and charge cycles vary with use and settings. Battery may eventually need replacement.
  • Hot Bento is not intended to reheat or thaw frozen foods.
  • Hot Bento is not intended to cook raw or undercooked foods. Consuming raw or undercooked meats, poultry, seafood, shellfish, or eggs, may increase your risk of foodborne illness, especially if you have certain medical conditions.
  • Do not touch the stainless-steel food tray when Hot Bento is operating. Doing so may result in injury

Standard Consumer Warranty

Hot Bento warrants its products against defects in material and workmanship for 1 year from Date of Purchase. Pursuant to a Limited Warranty, Hot Bento will, at its option, repair or replace legitimately defective products. Please contact us for more information. 

IMPORTANT NOTE: Quality is Hot Bento’s top concern. While overall return rates remain low, we take them seriously and investigate causes.

  1. Many returns have no problem and it seems users forget double tap to start. This is a feature to prevent accidental turn on when unit is carried in a bag, box or cooler.
    1. Power Button must be pressed firmly and quickly 2 times to turn on.
  2. Another major issue is water leakage causing the Printed Circuit Board Assembly to short out. While easy to clean, it is important to take care when washing:
    1. Make sure charge port cover is firmly closed
    2. Do not submerge
    3. Do not wash with dishwasher