A cell tray suitable for accommodating bottles of at least two different sizes. The cell tray has a loading surface to receive bottle bottoms in a matrix-like loading pattern and holding devices to receive and lock into place bottle mouths loaded onto a similar cell tray beneath said holding devices in a stack of cell trays. The holding devices are arranged as to align with at least two separate loading patterns on the loading surface. The first loading pattern is formed by a first plurality of holding devices arranged in a matrix-like formation having a first number of rows and columns. The second loading pattern is formed by a second plurality of holding devices arranged in a matrix-like formation having a second number of rows and columns. The second number of rows and columns is at least one less than the first number of rows and columns.