I used to sell it in the early sixties, and I am still using what I bought for myself at the time! It might seem expensive when you buy it, but if it lasts 45 years, then you really can't complain, can you?
Edit: Just Googled, and found a link for Tupperware in the UK and Ireland:
http://www.tupperware.co.uk/xchg/uk-ie/hs.xsl/67.html