Decaf

The decaf experience:

On the first image, a posh-looking Square-waiter brings a coffee to a Triangle-person sitting at a table. The Triangle-person exclaims “!” happily.

Second image shows the Triangle-person looking closely at the coffee while grabbing it, while a thinking cloud next to them shows a gift.

Third image, they are sniffing it with appreciation, while a thinking cloud next to them shows a heart.

Fourth image, they are gulping it down, while a thinking cloud next to them shows a sun.

On the fifth image, the coffee is empty and the Triangle-person is sitting with a very neutral face (albeit with a tiny smirk), while a thinking cloud next to them shows nothing at all.