found it finally for 3.89 used to be 1.99
everything is going up except paychecks.
I don't remember the specific price, but Walmart had the best price. The chain drugstores and Target all had what I thought were high prices.
I got mine at the local branch of a chain pharmacy (Walgreens), a milk carton size, as you say. Don't recall the price, but it didn't startle me. Also try the big stores like Costco etc., price might be better for bigger quantity.