Roche make a soft thin stretchy fabric 'Bra hanger' which their pumps fit in and the flexible, flat clip literally hangs onto the side of a bra with the pump below it at the side of the ribcage and the tubing coming out of the base of the container. The pump is totally enclosed because all functions and calculations are done using the meter/remote control.
Not a girl? No problem! I've frequently worn the pump using this, attached to the waistband of a skirt or trousers, pump on the inside (just move it round the waistband until it's in a comfy place for sitting, driving, walking etc) and being as the clip itself is transparent it is literally hardly noticeable.
The access aperture is tiny though and quite a struggle sometimes to get the pump into it - but nowhere near as difficult as trying to fit a new door seal on an automatic washing machine ! LOL
As it fitted the Combo as well as it does the smaller Insight, one assumes it would fit any make of pump. But - utterly useless if you need access cos the bolus etc calculator is on the pump itself.
If trousers - or skirts - have a side pocket, just stick it in there with the 'spare' tubing stuffed back down the inside of the garment.