You will need a 2 litter soda bottle, kitchen shears, box cutter, and top soil.
With the box cutters or kitchen shears, cut the bottom portion of the bottle.
Cut a "v" notch on the at the bottom of the top portion of the cut soda bottle.
The "v" notch will allow you to fit the top portion of the bottle into the bottom half. You could use tape but it is easer to get the plants out this way and you can reuse the " greenhouse".
The creator of this guide has not included tools