This is a real fun idea for a contest.
I really don’t have a clue what it could be, but by reading your replies to the others, I did get some clues, so I think it’s worth taking a guess: you are squeezing a shampoo bottle

My entry is on behalf of Play 4 a Newbie Challenge. All proceeds will go to a newbie Prize Pool and hopefully you will get other players to join in your game too!

My team 💪 : @hermannsol, @curatorcat, @chels, @barski, @gracefavour