Flexible flask that compresses as you drink it to eliminate water bouncing inside and reduce sucking effort.
新的软瓶设计比这个更好。开口很小而且不那么坚固。
优秀的产品,携带方便,用途广泛!!
它将作为圣诞礼物,但我对自己的类似礼物非常满意。适合稍长运行的大小,以制备凝胶-水混合物。