From Halopedia, the Halo wiki
Chipplos is a brand of cheese-flavoured potato chips.
Chipplos potato chips can be found in a vending machine on the multiplayer map Streets.
Chipplos Cheese - a cheese flavour of the chips
There are two very similar chip brands - Chipplos and Chippics.
A bag of Chipplos in a vending machine.
Halo Infinite (First appearance)