I had a yellow Spiro bag, very proud of it I was, even though some blithering fool in the design department had decided that the very thing was a
metal slider on the zip

very useful in a RIB.
Anyway, I was standing in my LDS the other day and there was a modern version. Its got 'Aqualung' on it nowadays but its still big and yellow with black bits, I nearly bought it out of nostalgia
Ah, the eighties, a single spiro 100, the RNPL/BSAC 72 tables, 5 at 10, 5 at 5 and at least a four hour surface interval.