DIY T-shirt CPR manikin

Simple DIY manikin made by stuffing a T-shirt or hoodie with a PET bottle and filling material
Recycled materials:
→ 1 PET bottle
→ 1 T-shirt (or hoodie)
→ paper/towels/shirts as a filler
→ elastic bands
Price:
→ $ 0
Feedback mechanism:
→ No
Use (compression only / rescue breaths only / both)
→ compression only
Scientifically tested:
→ No
Tech requirements:
→ No
Videos from various creators:
Websites with further instructions:
→ Detailed instructions on a swedish website (adult manikin)