Heathrow Scientific HS1423BB Standard Weighing Boat, Polystyrene, Antistatic, Medium, 85 mm L x 85 mm W x 24 mm D, Black (Pack of 500)

I use these trays as disposable water and food dishes in a terrarium for a crested gecko. They're a great size for water and food, and they fit snugly in "average size" rocky food trays.

These are great. I can't think of anything negative to say. They're sturdy, maintain a consistent weight, and their flexibility and design make it so that pouring the sample into small containers for storage is a breeze. These are awesome :)

I use these to weigh out my herbs. They are the perfect size and you get a high quantity for the price.