one way to fill IV bags with distilled water...

We use this contraption to add distilled water to new or used (punctured) IV bags...

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On the top we have a permanent bag, with a slit cut out  (reinforced the bottom of the cut with duct tape). This is where you pour the distilled water you want in your reusable bag.

On the top we have a permanent bag, with a slit cut out  (reinforced the bottom of the cut with duct tape).
This is where you pour the distilled water you want in your reusable bag.

On the bottom is a "holder" for the IV bag you want refilled. We used an empty 'cleaner wipes' canister.

On the bottom is a "holder" for the IV bag you want refilled. We used an empty 'cleaner wipes' canister.

When filling a bag that hasn't been punctured we use a blunt tip... (side tip - you can drain bags this way - just put a blunt tip in, turn it upside down, and leave it in a drain for an hour)

When filling a bag that hasn't been punctured we use a blunt tip...
(side tip - you can drain bags this way - just put a blunt tip in, turn it upside down, and leave it in a drain for an hour)

If you are filling a bag that has already been punctured, you can use a home made IV top...

If you are filling a bag that has already been punctured, you can use a home made IV top...

Just a close up of the two options...

Just a close up of the two options...

I duct taped their caps to the side of the pole so they don't get lost, and ease of access...

I duct taped their caps to the side of the pole so they don't get lost, and ease of access...

We have a drugs/fluids/blood area in our lab where the students go to get IV bags. Depending on the users and/or fidelity we will either leave out 'new' non-punctured bags or 'used' punctured bags with a closed IV line already inserted.

I haven't messed with this build in a bit, but I'm sure some of you could offer some design improvements... let me know...