This bagworm was found in Singapore (near McRitchie Reservoir) some time in June 2012.
This is the plant from which the bagworms were obtained:
A few examples of the bagworms:
The bagworm when dissected out of its bag:
Is the plant Banana (looks similar)? If so, the bagworm (Psychidae) Kophene cuprea could be a possibility, since it is considered a pest on banana (Mosich & Larsen, 1978). The larval case is also supposed to be conical, but I cannot find an online picture for comparison.