Is it alright to consume unsupervised food items at work that are open and available to anyone, assuming the items were initially known to be Kosher1 and there's no evidence of tampering?
Items that are commonly in this category might include:
- Coffee Creamer
- Salad Dressing
- Sliced Raw Vegetables2
1 Assuming it came sealed and marked Kosher, or someone reliable for Kashruth supervised or personally prepared the food
2 Assuming the vegetables were known to have been cut with a Kosher/new knife on a Kosher/new cutting board and pose no other Kashruth problems (bugs, Tevel, etc.)