Search query: silicone cups for lunch box

Product: Amazon Basics Reusable Silicone Baking Cups, Muffin Liners - Pack of 12, Multicolor 12-pack of reusable baking cups; made of food-grade silicone; ideal for baking, lunch/snack cups, and more
Effortless food release—no greasing or cooking spray needed; stain and odor resistant
Freezer-, microwave-, and oven-safe (up to 428 degrees F); dishwasher-safe for quick cleanup
Cost-saving alternative to disposable paper cups; works with any standard muffin pan
Measures 3.5 cm high (1.38 inches); includes 2 of each color: pink, orange, yellow, green, blue, and purple Amazon Basics Multicolor