This is a popular humangear silicone container in the United States. I used it to hold olive oil when hiking. It has been cleaned. The capacity is 53ml. The size is approximately 5x8.3x3.8cm. It can be used for travel to hold shampoo, etc., or for camping to hold food items like ketchup. You can hook it up by raising the hook, or carry it with a carabiner. Raising the hook also acts as a double lock to prevent the lid from opening. It stands on its own, making it convenient for refilling. There's also a place to label it. The opening is wide, so you can wash the inside thoroughly.