Found some small bottles of a thin, tarry-looking substance in the supermarket today: it's super-concentrated coffee essence mixed with sugar. The idea is to squirt a teaspoonful into a glass of cold milk to make iced coffee. I chose the intense espresso version, it's actually quite good, very strong & not overly sweet. The syrup is 25% coffee, most iced coffee milk drinks are 0.5% coffee.
Regular-strength Yorkshire Tea comes in a box of 100 teabags & weighs 220 grams. So this stuff should, as the packaging proclaims, be "proper strong."

Still 100 teabags but the box is now 260 grams.
@ronnie I'm not talking about which is better either. It was just an observation.
// @matigo
@matigo That's what I'm trying to discover. Normally it's good for around 40 hours.
It’s sheer laziness. My MBP & MBA are beside the bed. I use one or the other depending on battery status. I have the proper chargers for both but aren’t using them. Instead I have a slightly dodgy Magsafe 1 charger from my 1st MBA. It can charge the 2011 MBP cos it has an SSD instead of a HDD. And it has a Magsafe 1 to Magsafe 2 adaptor so I can top up the new MBA’s power.

