Looks can sometimes be deceiving in a positive way. A good example is the t:slim insulin pump made by Tandem Diabetes Care Inc.

Introduced in June 2012, the t:slim looks more like a smartphone than an insulin pump. It has the footprint of a credit card and features a leakproof aluminum case, a rechargeable polymer lithium battery and a micro-USB port, which can deliver data to clinicians if necessary.