Lava Lamp Inspired Design

I used a RGB tea light style light - the one i used is here http://tinyurl.com/2p9m9t3k

I scaled the model up to 115% which gave the hole for the LED light as 40mm x 25.3mm

At 100% scale the inside hole is 34.5mm x 22mm

If you wanted to buy larger LEDs you can scale the model to increase the inside hole

I used Bambu Lab PETG Transparent, PLA Basic white works just as well