I just ordered a bunch of these for meal prep. I feel like they work for dressing or dip.

https://www.amazon.com/gp/product/B00BG4DH90/

We also have these for slightly larger quantity dip needs (and tiny snacks):

https://www.amazon.com/Sistema-4-39-Ounce-Containers-2-Pack-Container/dp/B0155IFONO/