RSSN - UPDATE/REDESIGN

 

Russian is modified such that only one bottle needs to be cut. The top one is intact, the bottom one has become a beaker, compared to devastation of the material in the original design. Wrappers from chocolate - much like everyone knows someone who uses plastic bottles, we all know someone who eats chocolate... :unsure: :facepalm: - are the tin foil wrapper around the lace of a throdden sneaker. 

 This illustrates the current issue at hand: The bottle empties for a part in the cup/beaker, yet somehow it rather contracts and reduces in size then draw air to blow that space reduction out again. Larger ones have similar problems, regardless of stuff such as knots in the cap. (current situation: solution design = remove cap; state: designed.). 

UPDATE-2025.258: 

1. current last bottle is filled with a mixture of water and leachate from leaves and branches in a plastic basin.

2. There remained an issue with the bottom. 

In the first version, with the lace through the cap, water flow was blocked. Somehow the bottom of the cup-bottle and the cap - even with the lace and knot in it - closed tightly, impeding airflow.  

Without the cap,  It closed tightly as well.

The third version is one where A. diagonal holes are cut into the rim of the cap; and B. the cap isn't screwed on tightly, thus creating free flow for water when the cap-with-cuts rests on the bottom.  

3. For now, I replaced the tin foil solution. Enter a ducttape wrapper around one, two or any number of laces together. 

Even when I cut this cap, I still have one operating bottle with cap left.