How many 1/2 litre bottle of water do you take

How many 1/2 litre bottle of water do you take? (wdf_q3_31e)
File: wdfbaseline
Overview
Type: Continuous
Format: numeric
Width: 10
Decimals: 0
Range: 0-99
Valid cases: 351
Invalid: 0
Minimum: 0
Maximum: 99
Mean: 1
Standard deviation: 9.1
Questions and instructions
LITERAL QUESTION
Whenever you take water, how much, on average do you take?
INTERVIEWER INSTRUCTIONS
FW:FILL IN TYPE OF CUP IN SPACE PROVIDED
http://aphrc.org/catalog/microdata/index.phpcatalog/75/variable/V515 - page 1