1. Prepare several empty plastic beverage bottles (preferably the same size as the bottle cap).
2. Thick transparent glue
Step 3 print cloth
Let me tell you what to do next!
1. Use a drink bottle to make it look like the swimming aid you want.
Each bottle must be tightly twisted together and glued to the seal.
3. Fix and wrap all bottles with thick transparent glue.
Just decorate it with a little cloth.
Not very beautiful, but very practical, convenient and economical.