Perfect size for starting little seedlings! It would take forever to eat that much yogurt to get this many cups and these are much sturdier than yogurt cups! These small round pots are made of very resilient plastic. These are not toss-away items; they should last you a number of growing seasons without any complaints. They have plenty of drainage holes around the outer edges of the bottom of the pot--not so tiny that you worry about excess moisture, and not so large that you have to add stones to prevent loss of your potting soil. The pots are in the "traditional" dark green shade. Green Plastic Plant Pots; Green; 4 in. Dia.; 20 pieces If you are seed-starting and want to nurse your seedlings into strong, healthy plants with excellent roots, consider potting up into each of these pots until your plants are garden-ready. These are also excellent pots if you intend to sell your seedlings at market--the quality of these pots show your dedication to the health of your plants.