Bamboo lid bento boxes generally have some level of odor resistance, but the extent can vary depending on the specific materials used in their construction and the care taken in cleaning and maintenance. Here are some factors to consider:

1. Bamboo Lid: The bamboo lid itself can have natural odor-resistant properties. Bamboo is known for its ability to resist absorbing and retaining odors compared to other materials like plastic. However, it's important to note that over time, bamboo may absorb some odors if not properly cleaned.

2. Main Container and Compartments: The odor resistance of the main container and compartments can depend on the materials used. Stainless steel compartments, for example, are typically more resistant to retaining odors compared to plastic compartments. If the compartments are removable, it is generally easier to clean and prevent odor buildup.

3. Cleaning and Maintenance: Proper cleaning and maintenance practices are essential for odor control. Regularly washing all parts of the bamboo lid bento box, including the lid and compartments, with mild dish soap and ensuring thorough drying can help prevent odors from developing. It's important to pay attention to any hard-to-reach areas or crevices where food particles or liquids may accumulate and lead to odor buildup.

4. Food Choices and Storage: The types of foods you store in the bamboo lid bento box can also impact its odor resistance. Strong-smelling foods, such as onions or certain spices, may leave residual odors in the box. Using food storage containers within the compartments or wrapping strong-smelling foods separately can help mitigate this issue.

5. Air Circulation: Allowing the bamboo lid bento box to properly air dry after cleaning can help prevent moisture buildup, which can contribute to odor development. Providing sufficient air circulation, especially for the bamboo lid, can assist in maintaining its freshness.

While bamboo lid bento boxes have some inherent odor-resistant properties, it's essential to follow proper cleaning practices and consider the specific materials and design of your bento box to maintain its odor resistance over time.