Straight-sided beer and cider glasses to reduce alcohol sales for on-site consumption: A randomised crossover trial in bars. by Brocklebank, LA, Blackwell, AKM, Marteau, TM, Hollands, GJ, Fletcher, PC, De-Loyde, K, Morris, RW, Pilling, MA, Pechey, R, Maynard, OM, Attwood, AS, Munafò, MR