Dark Blue French Butter Crock

This piece measures 5.5 inches high and is 5.5 inches in diameter at its' widest.
This piece is food safe, dishwasher safe and microwave safe.
Below is description of how to use the butter bell that I got from google:

A French butter crock, also known as a butter bell or butter keeper, keeps butter soft and spreadable on the counter by creating an airtight seal. To use it, soften butter and pack it into the bell-shaped lid, then fill the base with cold water. The water creates a barrier that prevents air from reaching the butter, thus keeping it fresh and spreadable.
Here's a more detailed breakdown:
1. Prepare the butter:
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Soften the butter to room temperature and firmly pack it into the bell-shaped lid of the crock. Ensure the butter fills the lid completely and is flush with the rim.
2. Add water:
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Fill the base of the crock with about an inch of cold water. The water level should be high enough to create a seal when the lid is placed inside, but not so high that it overflows when the lid is inserted.
3. Seal the butter:
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Invert the lid and carefully place it into the water-filled base. The water creates an airtight seal, preventing air from reaching the butter and causing it to spoil.
4. Change the water:
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Replace the water every 1-2 days, or more frequently if the environment is particularly warm. Some users add a pinch of salt to the water to help prevent mold growth.