Enter the common water bottle.
Hello bottle. Meet a Jiffy 7 pellet. It has some lettuce seedlings I need close to some light.
Clip off the top, drop the pellet in. Voila!
To note, I’ve been using the larger Jiffy 7 pellet recently. It’s bigger (42mm diameter), doesn’t dry out as fast. My last batch of tomatoes gave me a 100% yield from seeds from this larger pellet.
You can buy Jiffy 7 pellets in quantity through Amazon.