Bamboo lid bento boxes are generally not recommended for holding liquids or soups directly without additional precautions. While bamboo lids can provide a secure fit, they are not designed to create a completely watertight seal, and there is a higher risk of leakage or seepage when holding liquids.

However, there are a few options to use a bamboo lid bento box for liquids or soups:

1. Use Leak-Proof Containers: You can use separate leak-proof containers or silicone food cups within the compartments of the bento box to hold liquids or soups. These containers should have airtight seals and be specifically designed for holding liquids without leaking.

2. Double-Lid Design: Some bamboo lid bento boxes have an additional layer of sealing, such as a silicone or plastic lid, which can help provide a better seal for holding liquids. These double-lid designs offer increased leak resistance.

3. Thickened Compartments: Bento boxes with thicker and more durable compartments can help minimize the risk of leakage. Look for bento boxes with sturdy and well-constructed compartments that can better withstand liquids.

When using a bamboo lid bento box for liquids or soups, it's crucial to ensure that the lid is securely fastened and the bento box remains upright during transportation to minimize the risk of leakage.

If your intention is to regularly carry liquids or soups, it may be worth considering alternative options specifically designed for holding liquids, such as insulated thermos containers or leak-proof lunch boxes.

Always review the manufacturer's instructions and guidelines for the specific bamboo lid bento box you choose to understand its limitations and recommendations regarding liquids or soups.