Listings show a wide range of materials: fabric, wheat straw and food-grade PP, 18/8 stainless steel, recycled PET (60% and 70%), PEVA, polyester, polypropylene, ABS, and TPE.
Some lunch bags include multi-layer thermal insulation or a PEVA interior liner to help keep meals fresh; insulated designs are commonly noted in product listings.
Some bento-style containers list recycled PET in their plastic—examples in the results include 70% recycled PET and 60% recycled PET.
Compartment options include 3‑compartment and 4‑compartment trays and multi‑compartment snack boxes. Listed capacities in the results include 16 ounces, 28 ounces, 4 cup, 2.8 quart, 5.4 cup, and 44 oz (about 5.5 cup).
Kits commonly include food containers or divided trays, matching lids, removable dividers, and sometimes extra containers or an ice pack.
Many kids' options list "3 Years and Up," while a few larger boxes specify broader ranges such as "12 Years and Under" in their listings.