16 oz Cocktail Tumbler - Insulated Margarita Tumbler with Lid

It looks exactly like a real ankle monitor — patent-pending fake LED lights, metallic barcode sticker, adjustable strap — and it holds over three shots of your beverage of choice. The listing notes it is "made from plastic so it will not set off metal detectors," which is either a practical feature or a deeply personal one depending on your situation. The flask slides out of the holster for quick access, includes a mess-free funnel, and fits almost any ankle size. An instant conversation starter and a genuinely funny gift for dad, a bachelor party, or anyone who appreciates a good Father's Day gag gift that doubles as functional drinkware.