this was copied from a post by Jimi D.
I learned this from a friend: Fill 1/2 of a 30 ml bottle of ground coffee. I used Cuban coffee because it's really strong.. Then top it off with PG and microwave for 10 seconds. (no longer). The Pg will absorb the coffee. Then top off again with pg, then place bottle in a hot water bath for 20 minutes. Strain mixture with a coffee filter. I used a funnel, and cut the filter to fit.
I learned this from a friend: Fill 1/2 of a 30 ml bottle of ground coffee. I used Cuban coffee because it's really strong.. Then top it off with PG and microwave for 10 seconds. (no longer). The Pg will absorb the coffee. Then top off again with pg, then place bottle in a hot water bath for 20 minutes. Strain mixture with a coffee filter. I used a funnel, and cut the filter to fit.