Japan is pretty smart, and sometimes McDonalds in particular. Since my husband and I have been here, we’ve seen specials where the adults get ‘toys’. The soccer world cup had special glasses you could collect, there have been two sets of McDonalds phone straps (specifically, it was a food item strap, like the fish burger), and now….
…we have six different glasses shaped like coke bottles (gotta catch ’em all!) After May 20th you can get Green, Dark Blue or Dark Gray, and after the start of June you can get Light Blue, Pink or Clear.
You can only get these if you make your set order a large (L size drink, L sized fries with your set), and I’m not sure if you’ll be able to choose a color or just get them randomly (that seems to depend on who’s manning the counter).
All I know is, I’m probably going to gain some weight around late May, early June. 😉