VIVI Cap: Thermal Pen Protection

Scientifically proven to protect insulin Works every day for years. No maintenance needed! FSA/HSA eligible CLICK-N-GO™ - Simply take off the original pen cap and replace it with VIVI Cap.  Adds an additional cracking protection layer Built-in temperature sensor with easy to read temperature indicator Replaces pen cap- so it's always on your pen Small & lightweight - fits in your purse or pocket No need for water, ice packs, refrigeration, or battery charging Choose your VIVI Cap for pre-filled or re-fillable insulin pens.