Marginally useful info at best here, but if you're trying to Feed Meteor to Plant or go for some other weird bonus category, don't bother with the Pepsi Machine in the lab. The Cold Can of Pepsi will not get you past Green Tentacle.

Got a little off topic on Niss' more relevant question and it reminded me of this even less useful tidbit:

you cannot give the Cold Can of Pepsi to Sandy or Dr. Fred during an extra turn (they can't accept it in the lab during the main game either). Even though they spawn on the porch during the apologies cutscene, there is no known way to park collected items to survive into the post-game, so you still need to get past Purple Tentacle/where Purple Tentacle was in the main game a second time to collect the can from the vending machine in the lab. Once you enter the inner lab on an extra turn Sandy and Fred will be respawned there and missing from the porch if you go back there again. The self-destruct timer will also restart so it goes from a dead end to an impending loss at that point. Pretty sure I deleted the b-roll that showed this to save disk space though.