Use "lower berth" in a sentence

1. ticket this year,' I said as I chained our suitcase to the lower berth

2. Having been assured of a love-filled future for Roopa, soon Sandhya slept pleasantly on the lower berth in that coupe for two

3. He moved the knife away and shoved Joe against the lower berth of the bunk bed, which moved a couple of inches back toward the wall when he struck it