Remember that scene in header? - Here we could see Cooper pooing with Cupcakes! 😁🍧 ( it wouldn't be so 'nice' in RL !  ^_~ ) 

( - & it reminded me an Easter Bunny from 'Hop' movie - If you saw it you remember: That Easter Bunny was Pooing with Sweets! 😂🍬🍬 - so they also made this natural but 'not nice' process 'much nicer' there! :D ). 

And Guy Diamond in Trolls was Farting With GLITTER! 😁 ( - That looked nice & I guess had No Smell !  ^_~ )

What's also fits this part is: 

- Remember that scene when Branch told Poppy that the Supplies in his Bunker will be 'enough for him for 10 years - or 11 if he stores his own sweat?'  

- I instantly thought that he said 'sweat' to make it 'less disgusting' - because I heard of people trapped in some places & surviving only thanks to drinking their own urine. ( Yes, Urine!... - That's what they do in extreme conditions in RL... - Cause how much sweat can you get? - it wouldn't be That Much for sure! )