Geocaches come in different sizes, shapes and levels of difficulty.
- Nano: tiny container, often magnetic, contains only a note as a logbook;
- Micro / Mini: film cans or PET blanks (a preform of the PET bottle), often contains a note and pen;
- Small: sometimes contains small items next to the logbook;
- Normal: contains several exchange items;
- Big: container with several, often unusual, exchange items;
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