I rarely snack... Instead I save half my meal for later.
Otw...
Pickles (ESP eggplant & beefsteak leaf pickles)
Hummus
Tamagozushi
Chicken dog (just the dog)
Couple gyoza
1 inari
Tomato w/ pepper man
Cottage cheese w pepperman
Radishes and salt
Peas and salt (kosher for both)
Popcorn & nutritional yeast
Big bite of my Sammie I'm having later
Couple bites of greens
1 caramel
Flake off my 72% cacao chocolate bar (vahlrona or similar)
Couple strawberries
Small handful of cereal
Roasted white carrots
Roasted beets
Couple meatballs
Virgin bloody Mary mix
Spoonful of honey
Couple shrimp dipped in _____ (Harissa, chimichurri, etc)
Small handful of edamame
Baguette sliced toasted w basil
Arugula
A few grapes (frozen)
Celery in any quantity (burns more digesting than it has)
Espresso
Chocolate covered espresso beans
Couple mango slices
Jicama Sticks
Iceberg w pungent herbs
Sriachi sauce
Miso Soup
Etc.
I used to (starve, can't say live) off of 400 cal a day. There's tons of stuff with little to no nutritional value... And even things with dense calories with just a bite or three only have a few.