Another item I highly recommend is the rhino duel spout glass https://www.espressobreakdown.com.au/product-page/rhino-shot-glass-double-spout

It holds a double shot and has the handle to protect my fingers. Duel spout is helpful. Had mine for easily 8 years. The numbers of gone but i can see at the glance of an eye that my shot is the right amount/colour etc.