Plural of timbo. In Colombia and in particular is Urabá is a large plastic container for transporting liquids. Bottles, carafes, pimpinas, talambucos, calambucos.
Although it is a lunfardo voice that is almost always used in the plural, to clarify that it comes from timbo which is a loot vesre, a shoe in sports principle, but that later was extended to any pair of shoes (that is used in the plural).