With my brothers home due to COVID, lemonade was disappearing faster than usual. The solution was clear: a lock that would prohibit anyone without the key to drink the lemonade.
I designed a pair of 3D-printed parts that interlock into the folds of a lemonade carton. The two components lock together with a padlock and in my experience render a lemonade carton completely brother-proof.
![](https://cdn.myportfolio.com/68cba623-80f1-42bc-9612-f753d722aa66/83229469-adb3-4b2f-a654-eb5a2feab2b1_rw_1920.jpg?h=4462b3050a75cc83ebc9db194c6befa4)
![](https://cdn.myportfolio.com/68cba623-80f1-42bc-9612-f753d722aa66/ab1a0ef5-9303-4e26-9dbf-62c1c06ca8e3_rw_1920.jpg?h=909aa3eb67971cab703c4935115343f4)
![](https://cdn.myportfolio.com/68cba623-80f1-42bc-9612-f753d722aa66/2191f8dd-9549-444a-a680-eebe813a5368_rw_1920.jpg?h=2d8774950f71411a1f941f061ac7b8a0)