Prep the chicken. If using leftover or rotisserie chicken, pull it into bite-size pieces.
For canned chicken, drain well and flake with a fork. Season lightly with salt and pepper.
Mix the buffalo cottage cheese base. In a bowl, stir together the cottage cheese, buffalo sauce, ranch seasoning (or fresh herbs), and lemon juice. Taste and adjust heat level with more buffalo sauce if you like it spicier.
Toss the chicken. Fold the chicken into the buffalo cottage cheese mixture until everything is evenly coated and creamy.
Chop the veggies. Slice celery, cucumbers, bell peppers, and carrots into sticks or bite-size pieces.
Halve the cherry tomatoes. Pat any extra-wet veggies dry with a paper towel to keep the box crisp.
Assemble the boxes. In each lunch container, add a generous scoop of the buffalo chicken cottage cheese mixture. Tuck in piles of veggies around it.
Sprinkle green onions and herbs over the chicken. Add blue cheese crumbles if you’re using them.
Pack the extras. Add crackers or pita chips in a separate compartment or small bag so they stay crunchy. If including avocado, pack it in a small lidded cup with a squeeze of lemon and a pinch of salt.
Seal and chill. Close the lids tightly and refrigerate.
These are best after chilling for at least 30 minutes to let the flavors come together.