Celine had keys and her phone, and possibly a garbage bag and water bottle.
They could all fit in her pockets, except for the water bottle. It is just a commercial water bottle
Searchers find a water bottle and a garbage bag that may have been used as a poncho in the Tasmanian bushland where Belgian tourist Celine Cremer went missing.
www.abc.net.au
In this report there is picture of the bottle and bag, and what looks like some sort or purple/pink item with a knot in it. Bottle had expiry date of Apr 2024, the still type of water has a 18-month date, which puts in within Celine's window.
But the bottle looks glass and heavy. Hard to imagine she carried it all that distance in her hands, makes me think she may have had a backpack.