VTG Whistle Handle Milk Mug For Champs Ceramic Kids Cup Whistle Japan 50s 60s

Vintage mid-century ceramic novelty children's milk mug featuring a functional built-in whistle handle, light blue rim accent, and retro motivational graphics. Origin: Made in Japan (retains original foil base label). Graphics: Front features a flexed bicep illustration reading "Whistle If You Are Champion! Milk Mug For Champs" and "Be Strong! Drink Milk!". Back side displays a "Blow Whistle" portion level scale reading "Weak Sister Portion," "Growing Up Portion," and "Champ Size". Special Feature: Fully integrated functional ceramic whistle on top of the handle. Material/Color: Off-white glazed ceramic with crisp black text, hand-painted details, and light blue rim trim. Condition: Good vintage pre-owned condition with age-appropriate surface crazing visible in glaze. No major cracks or breaks in the whistle mechanism.