THERMOS JNL350BK4

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THERMOS 12oz Stainless Steel Direct Drink Bottle (Model JNL350BK4)

User Instruction Manual

1. Introduction

This manual provides instructions for the safe and effective use of your THERMOS 12oz Stainless Steel Direct Drink Bottle, Model JNL350BK4. This insulated bottle is designed to keep your beverages at their desired temperature for extended periods, suitable for various daily activities.

2. Product Features

  • THERMOS Vacuum Insulation Technology: Engineered for maximum temperature retention, keeping beverages hot for up to 9 hours or cold for up to 18 hours.
  • Durable Stainless Steel Construction: Ensures longevity and resistance to wear.
  • Sweat-Proof Exterior: Prevents condensation from forming on the outside of the bottle.
  • Push Button Lid with Locking Ring: Provides secure closure to prevent accidental spills.
  • Smooth Flow Lid: Designed for comfortable and controlled drinking.
  • Compact Design: Fits most automobile cup holders for convenience.
  • Easy to Clean: Lid components disassemble for thorough cleaning, and the bottle is top-rack dishwasher safe.

3. Setup

3.1 Initial Cleaning

Before first use, and after each use, thoroughly wash all parts of the bottle. Refer to the "Maintenance & Cleaning" section for detailed instructions.

3.2 Filling the Bottle

  1. Unscrew the lid from the bottle.
  2. Fill the bottle with your desired beverage. Do not overfill; leave space for the lid.
  3. Securely screw the lid back onto the bottle, ensuring it is tightly sealed to prevent leaks and maintain temperature.

For best results with hot beverages, pre-heat the bottle by filling it with hot water for 5-10 minutes, then empty and fill with your beverage. For cold beverages, pre-cool with cold water.

4. Operating Instructions

4.1 Opening the Lid

  1. Locate the locking ring on the lid. Slide the locking ring down to unlock the push button.
  2. Press the push button to release the lid, which will spring open.
THERMOS 12oz Stainless Steel Direct Drink Bottle with lid open

Image: The THERMOS bottle with its push-button lid open, revealing the drinking spout and internal components.

4.2 Drinking from the Bottle

  • Once the lid is open, drink directly from the smooth flow spout.
  • To close, simply push the lid down until it clicks securely into place.
  • Slide the locking ring up to engage the lock, preventing accidental opening.

4.3 Transporting the Bottle

Always ensure the lid is securely closed and the locking ring is engaged before transporting the bottle to prevent leaks. The bottle's design allows it to fit in most standard cup holders.

5. Maintenance & Cleaning

5.1 Daily Cleaning

  • Bottle Body: Hand wash with warm, soapy water or place on the top rack of a dishwasher.
  • Lid Assembly: The lid components are designed to disassemble for thorough cleaning.
    1. Press the tab set on the upper inside of the lid.
    2. Press the drink spout down to remove the inside piece.
    3. Wash all disassembled parts with warm, soapy water.
    4. Rinse thoroughly and allow to air dry completely before reassembling.
THERMOS 12oz Stainless Steel Direct Drink Bottle with lid components disassembled

Image: The THERMOS bottle with its lid disassembled, showing the separate components for cleaning.

5.2 Important Cleaning Notes

  • Do not use abrasive cleaners or scrubbers as they may damage the finish.
  • Ensure all parts are completely dry before reassembly and storage to prevent mold or odors.

6. Troubleshooting

ProblemPossible CauseSolution
Bottle is leaking.Lid not securely closed or locking ring not engaged. Gasket/seal is damaged or missing.Ensure lid is tightly screwed on and locking ring is slid up. Check all gaskets and seals for proper placement and condition. Replace if damaged.
Beverage not staying hot/cold.Lid not properly sealed. Bottle not pre-heated/pre-cooled.Verify lid is tightly closed and sealed. Pre-heat with hot water for hot drinks or pre-cool with cold water for cold drinks before filling.
Unpleasant odor inside bottle.Improper cleaning or prolonged storage with residue.Thoroughly clean all parts, especially the disassembled lid components. Use a mixture of baking soda and water for stubborn odors, then rinse well. Ensure complete drying before storage.

7. Specifications

  • Model Name: 12oz Stainless Steel Direct Drink Bottle, Black
  • Model Number: JNL350BK4
  • Brand: THERMOS
  • Capacity: 12 ounces (approximately 355 ml)
  • Color: Black
  • Material: Stainless Steel
  • Product Dimensions: 3"W x 7"H
  • Item Weight: 8.8 ounces
  • Temperature Retention (Hot): Up to 9 hours
  • Temperature Retention (Cold): Up to 18 hours
  • Care Instructions: Dishwasher Safe (top rack for lid components)
  • UPC: 041205710233
Front view of the THERMOS 12oz Stainless Steel Direct Drink Bottle in black

Image: Front view of the THERMOS 12oz Stainless Steel Direct Drink Bottle in black, showcasing its sleek design.

8. Warranty & Support

For specific warranty information and customer support, please refer to the documentation included with your product packaging or visit the official THERMOS website. Contact details for customer service are typically provided on the manufacturer's website.

You can visit the THERMOS Store for more information: THERMOS Official Store

© 2026 THERMOS. All rights reserved.

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