Topper for Eisco Calorimeter

This is a topper for an Eisco Calorimeter that fits inside the calorimeter leaving less air space. I created this because I wanted my students to be able to calculate the specific heat capacity of water while only using 100 ml of water. With the standard lid and coil, the coil sits right towards the top of the cup forcing you to use 200 ml of water to submerge the coil for heating. I went looking to see if someone created something like this so that I could print it and didn't find one. So figuring it was nothing more than different sized circles placed strategically I decided to tinker it up. My measurement results are shown, think it works pretty good I figure if it helps me it can help you too. My tinker is shared publicly on tinkercad under the name: EiscoTopper if you wish to modify. Just please freely share what you do.