Would that be those?
https://www.etsy.com/ca/listing/497724396/set-of-3-vintage-collapsible-drinking?ref=market
https://www.etsy.com/market/collapsible_cup
https://www.ebay.com/sch/i.html?_fr..._nkw=vintage+collapsible+plastic+cup&_sacat=0
or the boy scout version:
http://www.ebay.com/itm/Vintage-Boy...549741?hash=item23857f062d:g:jxAAAOSwlY1ZHOwb
https://www.etsy.com/ca/listing/497724396/set-of-3-vintage-collapsible-drinking?ref=market
https://www.etsy.com/market/collapsible_cup
https://www.ebay.com/sch/i.html?_fr..._nkw=vintage+collapsible+plastic+cup&_sacat=0
or the boy scout version:
http://www.ebay.com/itm/Vintage-Boy...549741?hash=item23857f062d:g:jxAAAOSwlY1ZHOwb
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