Coolers should not be put under direct sunlight to retain its temperature inside.
The Storage time of coolers may still depend on the usage. Avoid opening the cooler from time to time to maintain its low temperature inside.
Ice retention on tags on coolers may vary since Philippines is a tropical country. Cooler tag may say 5 days ice retention but can only last to 1 or 3 days depending if the cooler is regular or Xtreme because of the warmer external temperature.