deli cups are good enough of me. i'll display them when they're adults.I prefer the enclosures that are aesthetically pleasing even if they're more expensive.
I like my T area to look like I have a collection of pets, not condiments.
Since I haven't seen anyone address premolt yet: The biggest giveaways are going to be refusal of food and a swollen, shiny, grape-like abdomen. When that happens, take extra care to leave your little buddy to do its tarantula thing. Keep it with plenty of water. Hopefully we've got some quick-growing ones--I love my other two, but they're slow growers and I want to see one grow like a weed. Happy tarantula-ing!