Cheap AIO, Pocket or WP Trainer

[Lineymom]

My ECed nearly 17mo DD is starting to regress   I have nothing that is very waterproof.  I'd like to get her superundies or some other waterproof trainers I've seen on etsy etc, but can't afford them.  Everything I've found that is more affordable is super-bulky.

I need something trim (DD is chubby, bulky is unflattering, lol.  Also she is hot natured and it is already getting hot.

So I am in the market for the type trainer I described or a cheap aio or pocket that  does not have a stay-dry liner (too hot anyway) has velcro (quick off for potty).  It needs to be sized big, not one size.  DD is 35lbs.

Thanks

[Perdita_in_Ontario]

Have you tried Mother-Ease trainers? They're puffy, but squish down really well, and they hold a lot - DS wears them during the day and when I don't catch him in time, uses them like a diaper - they hold everything in. They are pull-down, but I find that they go up/down very easily. I think they are probably cheaper than Super-Undies, but I didn't check. Bummis trainers are similar and I like them too, although they may be a little tighter around the legs.