Zip top bag lined. This is technically a lunch bag pattern, but it could be just any generic zip top tote bag.
Zaaberry: Insulated Lunch Tote Tutorial
Chubby Lunch Tote - Free Sewing Pattern! Cute free lunch bag sewing pattern.
Lunch Box Bag free sewing pattern. Replace with insulation lining to become a thermal bag.
How to Make a Kid's Lunch Box Pattern and Tutorial via @Amber Price: Crazy Little Projects
Sew an insulated lunch bag Nancy Zieman
Kids Insulated Lunch Box Pattern. Just in case I can't find what I want...going to sell these
Insulated lunch hamper for 2. LOVE big bags photo_val1
Make your own insulated lunch bags with your favorite fabrics. Includes make your own laminated fabrics for a wipe-clean option too.
DIY Lunch bag Tutorial This is an adorable lunch bag. took me about 2 hours. Tute is good although I wish there was a cut list at the start