I'm clearing out my parents' house and found a SANSEI Joyful Pack, a three-tiered, airtight plastic lunchbox. - Brand: SANSEI - Model Name: Joyful Pack - Material: Plastic - Configuration: 3-tiered - Features: Airtight lid This is a picnic lunchbox with three different sizes: large (3rd tier), medium (2nd tier), and small (1st tier). Size: 14cm x 20cm (lid 15.5cm x 24cm including fasteners) Depth: Large 8cm, Medium 6cm, Small 4.5cm Can be used individually. It also has a gasket for a perfect seal. The color is a calm ivory. It has a handle for convenient carrying of all three tiers together. It's Showa retro and an old item, but it's made more durably than current products. Please refrain from purchasing if you do not understand vintage or antique items, or if you are overly sensitive to imperfections.