Who remembers Horlicks tablets?
It looks like they're still available...
https://www.ebay.co.uk/itm/5-PACKS-O...UAAOSwA4dWJ4z7
However, I remember them being sold in an incredibly tightly-wrapped tube, rather than a sachet.
I haven't drunk Horlicks for years but do have fond memories of drinking it just before going to bed when I was about 10.