A Dutch Classic, the bottlescraper.

The bottle scraper (known as both a flessenschraper (bottle scraper) and flessenlikker (bottle licker) in Dutch) is a Dutch kitchen tool similar to a small spatula.
It is specifically designed to scrape the contents of long bottles or cartons that would be impossible to reach with other kitchen tools.
Also handy to empty saucebottles or yoghurt tubs