Things that will make aliens go w̶̨͎̞̗̮̬͎̟̆̃̌̌́́͂̈͐͘h̷̨̰̻̭̫̮̰̓̽͋â̵̖̪͙͊̈́̌t̷̨̠̠͎̥̞͒̊̒͘͝ ̷̛̙͖͔̣̼̫̝̳̿̂̐̅̈͝ţ̷̹̪̍͐͐̒̃̊́͂͠h̶̥͕̹̦̀͂͋̅͑͛ė̵̥̟̠̼̘͎̳̈̀̉̅́̀̀͜͝ ̶͚̟̜̱̙̠̋́́͒̔́f̷̘͖̅̋̊͘̕͠͝ư̶̬͍̗̥͓̹͈̤͆̎̓͂ć̵̙̬̼̈̓͗͂͑k̴͍̱̿
Things that will make aliens go w̶̨͎̞̗̮̬͎̟̆̃̌̌́́͂̈͐͘h̷̨̰̻̭̫̮̰̓̽͋â̵̖̪͙͊̈́̌t̷̨̠̠͎̥̞͒̊̒͘͝ ̷̛̙͖͔̣̼̫̝̳̿̂̐̅̈͝ţ̷̹̪̍͐͐̒̃̊́͂͠h̶̥͕̹̦̀͂͋̅͑͛ė̵̥̟̠̼̘͎̳̈̀̉̅́̀̀͜͝ ̶͚̟̜̱̙̠̋́́͒̔́f̷̘͖̅̋̊͘̕͠͝ư̶̬͍̗̥͓̹͈̤͆̎̓͂ć̵̙̬̼̈̓͗͂͑k̴͍̱̿
Looks like Styrofoam to me, but even paper plates have some kinda sealant that would let them last as long as that hot dog would.