Collapsible, Over-the-headboard Drink Holder

My son sleeps on the top bunk and always likes to have a glass of water with him at night. Fearing many spills, I designed this drink holder that hangs either on the headboard or on the railing next to his bed. To help tuck it out of the way when not in use, the drink holder has a hinged design allowing it to fold-up and stay out of the way.

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