Not sure where I should be posting. I have been a pump user for 15 years and am taking a "pump vacation". I pay for all my own supplies and opted to use Lantus pens and needles for the remaining 5 bottles of humalog that I have left. I am doing great with the lantus pens with ulta fine nano tips (4 mm 32 g) but the needles are larger at 8mm 30g. are there refillable pens that I could put the humalog in? I looked but haven't found any. Thanks.