This is a Minsa-weave drawstring bag. The bottom is sturdy, so I think it's easy to use. In image 13, there are signs of age-related staining. Also, there is overall age-related deterioration. Please purchase if you don't mind. The size目安 is shown in images 5-6. A 500ml plastic bottle will fit, but the top won't close. If you would like measurements, please comment and I will measure it for you♪ I will carefully package it and send it to you with care.