Ive been noticing this as well. Almost all Ice cream used to be sold in 1/2 gallons,not anymore,48 oz,but the package is shrunk to look exactly the same as the 1/2 gallon it replaced.Today I bought a 1/2 gallon of Orange Juice,or I thought,the container looked a little thinner than a 1/2 gallon,so i looked,and yup its now 59 oz.Others I notice,potatoe chips,same big bag,but more air in there,and less chips,Yogurt,used to be 7oz,now 5-6.Also lately "hard rolls" no bigger than a donut in some supermarkets.Also notice all the 20oz water bottles all gone replaced by 16.9 oz.Gatorade was 20oz,now has a contoured bottle,and 16.9 oz for the same price...Lately I'm see cold cuts with prices advertised as (per 1/2 lb)instead of per pound to appear to be cheaper.