Keep in mind the vial, refrigerated on a non-moving shelf, will last a couple of months. It contains 1,000 units, which you aren't likely to use up before its time to switch to a new one (unless its a high dose kitty, in which case, you might).
Next time, get the Lantus Solostar pens - more upfront expense, but less waste. It contains 3 ml (300 units) instead of 10 ml (1,000 units). You draw the insulin out with a regular syringe.
Sam's Club in the US was about $47/3 ml Solostar pen.
There are some Canadian pharmacies that will ship online, WITH an Rx for Lantus ... if you trust the shipping to remain cool enough not to damage it and to avoid unnecessary roughness with the packages.