A chuspa is a hand-woven pouch, roughly the size of two spread hands, hung from a woven strap over the shoulder. It is warp-faced weaving in camelid or sheep wool, patterned in bands and figures particular to a region and often to a community, and it is made by hand by someone the owner knows. What it holds is coca leaves.
That combination makes it one of the most used ritual objects in the Andes without ever ceasing to be an everyday one. Coca is chewed through the working day and it is also the medium of nearly every formal exchange there is. A chuspa is opened at the start of a conversation that matters. Leaves are taken from it and offered to the other person before any are taken for oneself, and the offer is not optional.
The unit that matters is the k'intu: a small number of whole, unbroken, undamaged leaves, selected deliberately, held together face up, breathed over, and then either given to another person or laid down as an offering. Selecting them takes a moment and is done in company, visibly, so that the care is part of what is communicated. A torn leaf will not do.
Weaving one is skilled work and takes time, so a chuspa carries information about who made it and where they are from before its owner says anything. A person's bag is recognised in the way a face is.