Purchased in October 2025, but I am selling it because I no longer have the opportunity to use it. Used a few times. * Made in Japan mug series, suitable from around 6 months old. Once they can drink. * The plump straw shape is easy to hold and suck. Furthermore, the new "spill prevention valve" structure prevents leaks from the straw. * Boiling, microwave, and chemical sterilization OK. Dishwasher safe. * W Rakupita Structure: Just tighten it to the mark! The cap also closes tightly to prevent leaks with a double seal. * The drinking spout and packing are integrated, making it easy to wash and care for.