Supreme quality glass cups with finger grips for cupping therapy.
I have been using this type of cups for years and can attest to their sturdiness. The thick glass is an advantage, and is easier to slide. The finger grips help too.
They come in three sizes:
S: external diameter , internal diameter, height 8 cm
M: external diameter, internal diameter, height 9cm,
L: external diameter, internal diameter, height 10cm