These are my go to for meal prepping day! We always try to avoid plastic!
Pyrex 18 Piece Simply Store Food Storage Set, Clear

Also use this set as well and really like them!
Vremi 18 Piece Glass Food Storage Containers with Locking Lids – BPA Free Airtight Oven Freezer Dishwasher and Microwave Safe Food Container Set – Small and Large Reusable Square Food Containers

These are what I pack my husband’s lunch in every day. Love that they come with utensils too!
[3-Pack] Glass Meal Prep Containers 3 Compartment – Glass Food Storage Containers – Glass Storage Containers with Lids – Divided Glass Lunch Containers Food Container – Bento Box Glass Food Container

Another great set for meal prepping!
Elacra Glass Storage Containers with Lids – Perfect for Storing Food and Packing Lunch – Oven and Freezer Safe, 6 glass containers