This is a Propane Tracker. You can track life totals or whatever your heart desires. This requires no glue at least when I have printed it. I have it at a .12mm layer height for printing which means more color changes but it's got a cleaner finish on the round parts. So if it's taking too long you can up the layer height but beware the finish might not be the same.

I used a dab of CA glue to attach the handle to the tank.

This is also the same system as my other trackers/counters. So if you've downloaded those this will be the same parts in between the top and bottom.