Almost all bottles which are see-through, regardless of colour, are PET plastic. Some PET bottles are not see-through but that is less common and rarely recycled in practice. While most types of plastic are not actually recycled, PET bottles often are. So should you try to recycle them? Yes!
Disposable Clear Plastic Bottles
Blue Bins & Chutes
Reverse vending machines are the best way to ensure this kind of plastic gets recycled.
Reverse Vending Machines
Recycling Bins & Chutes
While Singapore's plastic recycling rates are low (this is not unique to Singapore and is a global issue) this PET plastic is one of the better ones to put in the blue bins. Make sure it is clean!
Be weary of putting plastic in the segregated bin system which splits materials by paper, metal, plastic&glass.
Because plastic and glass have virtually no value, sometimes the "plastic&glass" bin simply gets dumped into the green trash bin. This does NOT happen with blue bins... but even in blue bins, plastic recycling rates are extremely low. If you really want to maximise the chance of these bottles getting recycled, find a reverse vending machine.
Does the bottle have any food waste like oil or sauce? Do not recycle it. Throw it directly into the trash.
Tips & Suggestions
PET is not intended for reuse. Never heat PET! Don't put it in the microwave or leave in a hot car. Store it away from sunlight. PET melts easily.