When I ordered some tea at a cafe recently, rather than place the
loose tea in a tea ball or basket, they placed the leaves in a
rectangular cloth-like pouch. The bottom of the pouch with the tea
steeped in the mug, but the pouch was long enough such that the top
hung out over the top of the mug, allowing me to easily remove it, and
with no tea ball to clean-up. The pouches look like something that
must come in bulk, and are meant to be thrown away after use, rather
than cleaned and recycled.

Does anyone know where I can purchase these type of pouches?

-bruce