Buy some glass jars with metal lids according to your size preferences.
Sterilize the jars and lids by boiling it for 5 to 10 minutes. Remove the jars and lids from the water and let them dry in a strainer.
Put the gourmet tuyo in the jars and close it with the lid. Close it tight but don't over do it because you might break the thread of the metal lid.
Put tap water in a big pot just enough to cover the jars and put a metal rack on the bottom inside the pot so the bottles won't shake when the water is boiling.
Put the jars in the pot with enough space on each other. Bring the water to a boil then lower the heat and simmer for 15 to 30 minutes.
Turn off heat and remove the jars from the water and place it on a flat surface like a wooden table and let it cool overnight or 24 hours.
When you see the center of the metal lid is sunken, it means the jars are air tight and the gourmet tuyo can last up to 6 months.
If you can still press the center of the metal lid and moves up and down, it means the seal has failed and just repeat the process above until the lid is sunken.