Cap For Lava Lamp

I made this lava lamp cap for my dad's lava lamp which he got around '78 i think so i tried to replicate his old one that broke and it's in one of the pictures. This cap doesn't have screws and I'm not sure if it will print well from the mobile app because it might try to print sideways but I'm not 100% sure this is my first print so please let me know of some recommendations.