Here's a polished product description you can use for Etsy, Facebook Marketplace, craft fairs, or your website:

Flip & Fill Microwave Bowl Cozy

Make heating meals safer and more convenient with these handmade Flip & Fill Microwave Cozies! Available in Small, Medium, and Large sizes, these cozies are made from 100% cotton (fabric, batting, and thread), making them safe for microwave use.

Simply place your bowl inside the cozy before heating. When your food is ready, the cozy helps protect your hands from hot bowls, making it easy to remove them from the microwave without burning your fingers.

Features:

• Available in Small, Medium, and Large

• Made from 100% cotton

• Microwave safe

• Machine washable

• Great for heating, cooking, and serving

• Helps protect your hands from hot dishes

• Reversible design

• Available in a variety of beautiful fabric prints to match your style or season

Perfect for soups, oatmeal, leftovers, chili, and more! They also make thoughtful gifts for family, friends, college students, and anyone who uses a microwave.

Please note: Always use with microwave-safe bowls and never leave the microwave unattended while heating.

If this is for Etsy, I can also help you create an SEO-friendly title and a list of keywords to help shoppers find your cozies.