Hello and welcome, Henry.

>does anyone collect those Twinings tins?

Apparently so; see:

http://cgi.ebay.com/ws/eBayISAPI.dll...tegory=45 585
>do you guys have mint
>tins?

Yes, but they will be very expensive. :-)
No, seriously, I used to keep some Twinings tins around for storing new
purchases of loose tea, but somehow I kept acquiring newer tins of other kinds
of tea, so the old Twinings tins got grotty and rusty. Eventually I stopped
drinking Twinings anyway.

It was the brand that first got me into the world of tea, though, some 40 years
ago.

Joe