In reply to Davina.

Hey Davina! The lemon juice is actually a snippet of a previous panna cotta we've made! I'l delete that right now :)

And according to Knoxgelatin.com : "If the recipe you want to use calls for unflavoured gelatine by the tablespoon, just use 1 envelope for each tablespoon called for."

It seems 1 sachet is 1 tablespoon!