This is the first in a series of five puzzle caches hidden around the village of Kalithies. The given coordinates are not where you'll find the cache. To find the cache, you'll have to solve the following puzzle:
Una’s hobby is making wines and spirits. She has just produced 1.111 litres of her famous tsipouro and wants to send an equal share to each of her 11 brothers and sisters. She also has some delicious wine (enough to exactly fill a volume that is 111.1 cm long by 11.11 cm wide and 11.11 cm tall) that she wants to send to her mother.
Today, Una bought some aluminium to make containers to hold the wine and tsipouro. The containers that Una wants to make are simple cylindrical cans like the one in the picture. The aluminium will be 1.11 mm thick everywhere and the upper surface of the can will be set 1 mm below the top edge so that the can may be opened with a can-opener.
You will find the cache at N36 20.XXX E28 10.YYY where XXX and YYY are the minimum possible weights of the aluminium (in grams, to the nearest gram) used to create all 11 cans for the tsipouro and the 1 can for the wine, respectively.
The cache is the size of a drink can and contains a log book and plenty of space for tradeable items, though you will need to bring your own pen.
Good luck!
W (a.k.a. DidianRay)
You can validate your puzzle solution with certitude.
Special thanks to aliasmom for testing the solution to this puzzle and pointing out an error before publishing