"SALE! weather machine" would be useful in all vending shop worlds. This weather machine should be working like Stuff weather machine where you choose the item in it. After the item has been chosen, you could inform the discount price for this "Daily discount special" item. Then it would show the discounted price for this chosen item as a weather background in whole world. Then people which are entering your vending store, would know immeadiately that todays special discount item is this, for example "Green Block sale! 100/wl" or something. Text could be written top of the item which is placed to "SALE! weather machine". This would be useful among all vending shop world owners. Highlighting the "daily special price" item.

See you. My world: Eranetti