Pokemon Center 2018 Saiko Soda Campaign Eevee plastic cup. "Saiko" means "best" or "awesome" in Japanese. It was only at the Pokemon Centers in Japan, in May, 2018, for a very limited time and in very limited quantity, during the Saiko Soda campaign. Made of plastic. Hand wash. DO NOT use in microwave, dishwasher, refrigerator, freezer or oven.