This is a set of two popular Combi "Rakumagu" mugs. The "First Straw" was not used effectively, so it was only tried once or twice. The "Leak-Proof Straw" was used in conjunction with other mugs, so it wasn't used very often, but it was used for about six months. *Sterilized by steam. ◼︎From 4 months old "First Straw" ◼︎From 6 months old "Leak-Proof Straw" - Brand: Combi - Colors: Pink, Blue - Features: With two handles - Material: Plastic - Capacity: Unknown (with markings) Thank you for looking.