Made of durable plastic with a latch?? seals well and easy to get open?? but doesn't pop open on its own and spill in your bag; high dividers make it hard to mix pills into the separate compartments</br>Box size: Length: 9.5cm/3.74in; Width: 6.5cm/2.56in; Height: 3.5cm/1.38in; Each compartment size: Length: 4