DIY Espresso Tamper
For 51 mm diameter portafilter baskets. I use this for my Starbucks Barista/Saeco Via Venezia/Estro Vapore espresso machine.
Use an empty 170 g. Coleman's mustard jar filled with mung beans, or any small dry bean. Larger beans will not pack the jar tight, and will make the 'tamper' lighter. Enjoy! The end.