Glass bottles with water floor for thermal storage?

Has anyone ever tried using glass bottles (beer bottle size, but with a closable lid that seals) filled with water, lying on their sides in tight rows, with cob or cement mortar to hold them in place, as a thermal mass heat storage for passive solar home design? (insulated underneath, of course)

I saw a picture of bottles in the floor and thought of this idea but am having trouble finding anything online to see if people have tried it.

At a time when I had no money and was building a small house, I used bottles instead of road base as a floor subgrade.
I just laid them out and covered them with 20mm road base and saved about   80% of the required fill.

I like John's suggestion to use them as a filler.

I feel that the water is not necessary as a thermal mass unless it is possible to use the sun as a feature to heat the water.

That is why using the bottle for walls is a good example of a thermal mass in passive solar.

I think it's an interesting idea. I haven't tried it, but would be worried about leaks over time. The bottles would need to withstand a fair amount of temperature cycling as they absorb and release heat. I suppose if you used beer bottles or similar that are designed to withstand internal pressure that might work.
thermal capacity of water is extraordinary however:
water: 4182
slate: 760
limestone: 909
brick: 840
(all J/kgdegC from engineering toolbox) The larger the number the more heat energy a material stores per unit mass. So a smaller amount of water will store more heat energy, which could be an advantage in a suspended floor I suppose.