1. Introduction
This manual provides essential information for the proper use and care of your Tupperware Modular Mates Rectangular #3 food storage container. Designed for efficient organization and preservation of dry goods, this container features a clear base and a Brilliant Blue seal.
2. Setup and First Use
Before initial use, it is recommended to wash the container and its seal thoroughly. This ensures cleanliness and removes any manufacturing residues.
- Unpack: Carefully remove the container and its seal from the packaging.
- Wash: Hand wash both the container and the seal with warm, soapy water. Use a soft cloth or sponge.
- Rinse: Rinse thoroughly with clean water.
- Dry: Allow all parts to air dry completely before assembling or storing food.
3. Operating Instructions
Proper sealing is crucial for maintaining the freshness of stored contents.
3.1 Sealing the Container
To ensure an airtight seal, follow these steps:
- Fill: Place your dry goods into the clear container, ensuring not to overfill. Leave a small space at the top for the seal.
- Position Seal: Place the Brilliant Blue seal onto the rim of the container.
- Press Corners: Starting from one corner, press down firmly on the seal to secure it to the container rim.
- Work Around: Continue pressing along the edges of the seal, working your way around the entire perimeter until the seal is fully attached and flush with the container.
- Expel Air (Optional): For optimal freshness, you may gently press down on the center of the sealed lid to expel any excess air before final closure.
3.2 Opening the Container
To open the container, lift one corner of the seal and gently peel it back from the container rim. Continue lifting around the edges until the seal detaches completely.

Image 1: Tupperware Modular Mates Rectangular #3 container with its Brilliant Blue seal. This image illustrates the product in its assembled state, ready for use.
4. Maintenance and Care
Proper care extends the life and performance of your Tupperware container.
- Hand Wash Only: This container is not dishwasher safe. Wash by hand with warm, soapy water and a soft cloth or sponge.
- No Microwave Use: This container is not microwaveable. Do not use it in a microwave oven.
- Avoid Abrasives: Do not use abrasive cleaners or scouring pads, as these can scratch the container's surface.
- Stain Prevention: To prevent staining, especially from tomato-based sauces or curries, rinse the container immediately after use.
- Drying: Ensure the container and seal are completely dry before storing to prevent odors or mildew.
- Storage: Store with the seal slightly ajar or separately to allow air circulation and prevent odors.
5. Troubleshooting
Addressing common concerns:
- Seal Difficult to Close: If the seal is stiff, try soaking it in warm water for a few minutes to make it more pliable. Ensure the container rim and seal are clean and dry.
- Container Odor: If the container retains odors, wash it thoroughly and then place a crumpled piece of newspaper or a small amount of baking soda inside, seal it, and leave overnight. Wash again before use.
- Staining: Some foods may cause staining. While not affecting performance, these can often be reduced by washing immediately after use or by exposing the stained area to sunlight.
6. Specifications
| Feature | Detail |
|---|---|
| Model | Modular Mates Rectangular #3 |
| Brand | Tupperware |
| Capacity | 27.5 cups (6.5 Liters) |
| Dimensions (L x W x H) | 11 inches x 7.38 inches x 6.75 inches (28 x 19 x 17 cm) |
| Shape | Rectangular |
| Material | Plastic (BPA Free) |
| Color | Clear container with Brilliant Blue seal |
| Dishwasher Safe | No (Hand wash recommended) |
| Microwaveable | No |
| Item Weight | 13.6 ounces |

Image 2: Side view of the Tupperware Modular Mates Rectangular #3 container illustrating its height dimension of 7.0 inches (17 cm).
7. Warranty and Support
Tupperware products are known for their durability and quality. For specific warranty information, including details on the Tupperware Limited Lifetime Warranty, please refer to the official Tupperware website or contact Tupperware customer service directly. Keep your purchase receipt as proof of purchase.
For further assistance or inquiries, please visit the official Tupperware support page or contact their customer service department.





