Color changing cups are reusable PP plastic, plastic cups with lids and reusable ,is splash-proof designed for kids women adults prevents spill and dust. Lightweight, durable color changing tumbler cup perfect for daily use and outdoor activities.With its sturdiness and durability, Even it helps the planet reduce waste and benefits people. re stackable and sapce saving. Water tumbler with straw are convenient to carry them to any activities, like party, festival, indoor or outdoor, family gatherings, sports, camping, picnic, travel, and more