Ohayo Milk, a food and beverage company, has teamed up with The Pokemon Company for a special campaign in Japan.

From now till June 18, 2018, collect 10 labels from Ohayo Milk’s Senobic Yogurt and receive a free Pokemon paper ruler to measure a child’s height.

Here’s the Pokemon themed Senobic Yogurt eligible for the campaign (four cups in each pack).

Have a look at the ruler, featuring Pokemon such as Rowlet, Charizard, and Wobbuffet.

Mail in the 10 labels you’ve collected to get your free ruler.

The bottom of every Senobic Yogurt lid features a random Pokemon!