I presume they're drinking cups (the part I don't understand, is "sealable"!) What's that about ... How does that work?, how are they used, do you take them out into the field with you like travel type cups that the contents can't spill?
Being as they're listed in Tobacciana is how I came across them & I was thinking they may be great to store baccy in ... http://www.ebay.com/itm/Vintage-New-Old-Stock-Set-10-Redman-Thermo-Seal-Cups-Tumblers-NEVER-USED-/110771062890?_trksid=p3286.m7&_trkparms=algo%3DLVI%26itu%3DUCI%26otn%3D3%26po%3DLVI%26ps%3D63%26clkid%3D4098953619994739335#shId
Most curious darn things I've ever seen!
Being as they're listed in Tobacciana is how I came across them & I was thinking they may be great to store baccy in ... http://www.ebay.com/itm/Vintage-New-Old-Stock-Set-10-Redman-Thermo-Seal-Cups-Tumblers-NEVER-USED-/110771062890?_trksid=p3286.m7&_trkparms=algo%3DLVI%26itu%3DUCI%26otn%3D3%26po%3DLVI%26ps%3D63%26clkid%3D4098953619994739335#shId
Most curious darn things I've ever seen!