WalletPop.com noticed it first third (after The Consumerist, which followed GinnySkal.com): Starbucks has removed the 12-ounce drink size from drive-through menus all over the country, leaving just 16- and 20-ounce possibilities.

While some customers have flashbacks to when the 8-ounce drink size disappeared from regular store menus, spokeswoman Stacey Krum explains the reasoning: "We'd heard from customers that our drive thru menus were cluttered and made it difficult to order. So we redesigned them focusing on making ordering easier by reducing the number of items and adding more product shots. Overall, we reduced the number of items on the menu by about two-thirds - typically going from 75 to 25 items. The items featured are our most popular items, including our most popular sizes - grande and venti. Ordering options are not limited to what's on the menu, and just as with the short size, drive thru customers may order any item or size of beverage we offer in the store."

Here's a glossary:

Short = 8 ounces (not on store menus)
Tall = 12 ounces (not on drive-through menus)
Grande = 16 ounces
Venti = 20 ounces (or 24, if it's iced)
Trenta = 31 ounces (tested in Phoenix and Tampa)