any healthy salty snacks?

i usually get chips, pringles, cheezits, and dots pretzels as snacks to help me with vasovagal syncope attacks at school but i want to try eating stuff that’s healthier. i’ll keep the pretzels, pringles, and ill get gatorade too but i want some ideas on some other things i could eat. i don’t have any (known) allergies, but i avoid a lot of foods. (arfid or just picky) it’s also difficult to use the microwave there because there is only one for all of us during lunch so please don’t say anything that involves microwaving. i usually put some soup in a thermos anyway