Interlocking Wine Bottle Holders

These wine bottle holders interlock horizontally and vertically using dovetail shaped pegs. I originally designed them as a way to easily store opened wine bottles in the refrigerator, without them rolling around on the shelf. 
The dovetail pegs are a bit taller than the cutouts in the model, so they stick out a couple of mm. you can shorten them a bit if you want them to sit flush.

Printed in PLA, with the bottle holder standing upright and the dovetail peg laying on one of the flat sides using auto-generated supports. There should only be supports in the dovetail shaped cutouts on the sides of the bottle holder, so modify your slicer settings if necessary. 
If you don't have good bed adhesion or a good first layer, maybe add an outer brim and slow down the print speed so that it doesn't come flying off midway through the print.
Use grid infill, as it fits the intended usage and print orientation.

Use the longer pegs for interlocking two pieces vertically and the shorter ones when only interlocking them horizontally, or at top of the stack..